images not behaving

I tried a test post with images:
https://abroad-abroad.org/wordpress/index.php/2005/08/07/vintage-toys-and-comics/

For some reason the justified and align-left images have borders but the centered ones don’t. I edited the post to re-align one and the border magically appeared.

I’ve poured over my CSS and just can’t get this. Any help would be awesome.

Here is my style sheet:
/*Theme Name: Brit’s Custom
Theme URI: https://www.ads-software.com/
Description: Slightly modified version of the default WordPress theme based on the famous Kubrick.
Version: 1.5
Author: Brittanie
Author URI: https://abroad-abroad.org/

Kubrick v1.5
https://binarybonsai.com/kubrick/

This theme was designed and built by Michael Heilemann,
whose blog you will find at https://binarybonsai.com/

AllSidebar modifications to Kubrick v1.5 are by Kaf Oseo.
Find his blog at https://guff.szub.net/

The CSS, XHTML and design is released under GPL:
https://www.opensource.org/licenses/gpl-license.php

*** REGARDING IMAGES ***
All CSS that involves the use of images, can be found in the ‘header.php’ file.
This is to ease installation inside subdirectories of a server.

Have fun, and don’t be afraid to contact me if you have questions.*/

/* Begin Typography & Colors */
body {
font-size: 62.5%; /* Resets 1em to 10px */
font-family: ‘Lucida Grande’, Verdana, Arial, Sans-Serif;
background-color: #FFFFFF;
color: #000000;
text-align: center;
}

#page {
background-color: FFFFFF;
border: 1px solid #FFFFFF;
text-align: left;
}

#header {
background-color: #FFFFFF;
border: 5px solid #000000;
}

#content {
font-size: 1.2em
}

.widecolumn .entry p {
font-size: 1.05em;
}

.narrowcolumn .entry, .widecolumn .entry {
line-height: 1.4em;
}

.widecolumn {
line-height: 1.6em;
}

.narrowcolumn .postmetadata {
text-align: center;
}

.alt {
background-color: #FFFFFF;
border-top: 0px solid #ddd;
border-bottom: 0px solid #ddd;
}

#footer {
background-color: #FFFFFF;
}

small {
font-family: Arial, Helvetica, Sans-Serif;
font-size: 0.9em;
line-height: 1.5em;
}

h1, h2, h3 {
font-family: ‘Trebuchet MS’, ‘Lucida Grande’, Verdana, Arial, Sans-Serif;
font-weight: bold;
}

h1 {
position: absolute;
font-size: 0;
left: -1000px;
}

.description {
font-size: 1.2em;
text-align: center;
}

h2 {
font-size: 1.6em;
}

h2.pagetitle {
font-size: 1.6em;
color: #000000;
}

#sidebar h2 {
font-family: ‘Lucida Grande’, Verdana, Sans-Serif;
font-size: 1.2em;
}

h3 {
font-size: 1.3em;
}

h1, h1 a, h1 a:hover, h1 a:visited, .description {
text-decoration: none;
color: white;
}

h2, h2 a, h2 a:visited, h3, h3 a, h3 a:visited {
color: #000000;
}

h2, h2 a, h2 a:hover, h2 a:visited, h3, h3 a, h3 a:hover, h3 a:visited, #sidebar h2, #wp-calendar caption, cite {
text-decoration: none;
}

.entry p a:visited {
color: #FF0000;
}

.commentlist li, #commentform input, #commentform textarea {
font: 0.9em ‘Lucida Grande’, Verdana, Arial, Sans-Serif;
}

.commentlist li {
font-weight: bold;
}

.commentlist cite, .commentlist cite a {
font-weight: bold;
font-style: normal;
font-size: 1.1em;
}

.commentlist p {
font-weight: normal;
line-height: 1.5em;
text-transform: none;
}

#commentform p {
font-family: ‘Lucida Grande’, Verdana, Arial, Sans-Serif;
}

.commentmetadata {
font-weight: normal;
}

#sidebar {
font: 1em ‘Lucida Grande’, Verdana, Arial, Sans-Serif;
}

small, #sidebar ul ul li, .nocomments, .postmetadata, blockquote, strike {
color: #666666;
}

#sidebar ul ol li, {
color: #000000;
font-family: ‘Lucida Grande’, Verdana, Sans-Serif;
font-size: 1.2em;
font-weight: bold;
}

code {
font: 1.1em ‘Courier New’, Courier, Fixed;
}

a, h2 a:hover, h3 a:hover {
color: #FF0000;
text-decoration: none;
}

a:hover {
color: #FF0000;
text-decoration: underline;
}

/* End Typography & Colors */

/* Begin Structure */
body {
margin: 0;
padding: 0;
}

#page {
background-color: white;
margin: 20px auto;
padding: 0;
width: 760px;
border: 0px solid #959596;
}

#header {
padding: 0;
margin: 0 auto;
height: 200px;
width: 100%;
background-color: #FF0000;
}

#headerimg {
margin: 0;
height: 200px;
width: 100%;
}

.narrowcolumn {
float: left;
padding: 0 auto;
margin: 0px 0 0;
width: 500px;
}

.widecolumn {
float: left;
padding: 0 auto;
margin: 0px 0 0;
width: 500px;
}

.post {
margin: 0 auto;
text-align: justify;
}

.widecolumn .post {
margin: 0;
}

.narrowcolumn .postmetadata {
padding-top: 5px;
}

.widecolumn .postmetadata {
margin: 30px 0;
}

#footer {
padding: 0 0 0 1px;
margin: 0 auto;
width: 760px;
clear: both;
}

#footer p {
margin: 0;
padding: 20px 0;
text-align: center;
color: #666666;
}/* End Structure */

/* Begin Headers */
h1 {
padding-top: 70px;
margin: 0;
}

.description {
text-align: center;
}

h2 {
margin: 30px 0 0;
}

h2.pagetitle {
margin-top: 30px;
text-align: center;
}

#sidebar h2 {
margin: 5px 0 0;
padding: 0;
}

h3 {
padding: 0;
margin: 30px 0 0;
}

h3.comments {
padding: 0;
margin: 40px auto 20px ;
}
/* End Headers */

/* Begin Images */
p img {
padding: 0;
max-width: 100%;
border: 5px solid #000000;
}
/* Using ‘class=”alignright”‘ on an image will (who would’ve thought?!) align the image to the right. And using ‘class=”centered’,
will of course center the image. This is much better than using align=”center”, being much more futureproof (and valid) */

img.centered {
display: block;
margin-left: auto;
margin-right: auto;
}

img.alignright {
padding: 4px;
margin: 0 0 2px 7px;
display: inline;
}

img.alignleft {
padding: 4px;
margin: 0 7px 2px 0;
display: inline;
}

.alignright {
float: right;
}

.alignleft {
float: left
}
/* End Images */

/* Begin Lists

Special stylized non-IE bullets
Do not work in Internet Explorer, which merely default to normal bullets. */

html>body .entry ul {
margin-left: 0px;
padding: 0 0 0 30px;
list-style: none;
padding-left: 10px;
text-indent: -10px;
}

html>body .entry li {
margin: 7px 0 8px 10px;
}

.entry ol {
padding: 0 0 0 35px;
margin: 0;
}

.entry ol li {
margin: 0;
padding: 0;
}

.postmetadata ul, .postmetadata li {
display: inline;
list-style-type: none;
list-style-image: none;
}

#sidebar ul {
margin: 0;
padding: 0;
text-indent: 10px;
}

#sidebar ul ol {
margin: 0;
padding: 0;
text-indent: 0px;
}

#sidebar ul li {
list-style-type: none;
list-style-image: none;
margin-bottom: 15px;
text-indent: 10px;
}

#sidebar ul p, #sidebar ul select {
margin: 5px 0 8px;
}

#sidebar ul ul {
margin: 5px 0 0 10px;
}

#sidebar ul ul ul, #sidebar ul ol {
margin: 0 0 0 10px;
}

ol li, #sidebar ul ol li {
list-style: decimal outside;
}

#sidebar ul ul li, #sidebar ul ol li {
margin: 3px 0 0;
padding: 0;
}
/* End Entry Lists */

/* Begin Form Elements */
#searchform {
margin: 10px auto;
padding: 5px 3px;
text-align: center;
}

#sidebar #searchform #s {
width: 115px;
padding: 2px;
}

#sidebar #searchsubmit {
padding: 1px;
}

.entry form { /* This is mainly for password protected posts, makes them look better. */
text-align:center;
}

select {
width: 130px;
}

#commentform input {
width: 170px;
padding: 2px;
margin: 5px 5px 1px 0;
}

#commentform textarea {
width: 100%;
padding: 2px;
}

#commentform #submit {
margin: 0;
float: right;
}
/* End Form Elements */

/* Begin Comments*/
.alt {
margin: 0;
padding: 10px;
}

.commentlist {
padding: 0;
text-align: justify;
}

.commentlist li {
margin: 15px 0 3px;
padding: 5px 10px 3px;
list-style: none;
}

.commentlist p {
margin: 10px 5px 10px 0;
}

#commentform p {
margin: 5px 0;
}

.nocomments {
text-align: center;
margin: 0;
padding: 0;
}

.commentmetadata {
margin: 0;
display: block;
}
/* End Comments */

/* Begin Sidebar */
#sidebar {
padding: 20px 0 10px 0;
margin-left: 560px;
width: 190px;
text-align: justify
}

#sidebar form {
margin: 0;
}
/* End Sidebar */

/* Begin Various Tags & Classes */
acronym, abbr, span.caps {
cursor: help;
}

acronym, abbr {
border-bottom: 0px dashed #999;
}

blockquote {
margin: 15px 30px 0 10px;
padding-left: 20px;
border-left: 0px solid #ddd;
}

blockquote cite {
margin: 5px 0 0;
display: block;
}

.center {
text-align: center;
}

hr {
display: none;
}

a img {
border: 5px solid #000000;
}

.navigation {
display: block;
text-align: center;
margin-top: 10px;
margin-bottom: 60px;
}
/* End Various Tags & Classes*/