My Posts are Overlapping!

I have posted two different blog posts on my site https://blog.drimmelphotography.com and for some reasons these posts are overlapping.

Here is my post code:

.post {
margin:0 0 25px 0; padding:0 0 35px 0;
background:url(images/post.gif) no-repeat bottom left;
}

.post-meta {
margin:30px 0 0 0; padding:0;
}

.post-meta-single {
margin:16px 0 0 0; padding:0;
}

.post img {
margin:10px;
}

img.wp-smiley {
margin:0;
float:none;
}

.post-date {
margin:10px 0 -20px -85px; padding:0;
width:53px; height:45px;
background:url(images/date.gif) no-repeat top center;
position:absolute !important; position:relative; float:left;
display:inline;
}

How do I fix this? I am using a theme installed from wordpress.

Any help appreciated!