sidebar inconsistent

There is only one sidebar – it just has a lot of conditional statements (if is home > show this; if is archive > show that etc.)
Edit/delete those conditional tags or pick a simpler theme.

Can you recommend a book or site that I can use to learn PHP, so that I can be empowered to understand and edit all of the commands? I find www.ads-software.com/support scattered and hard to find the info I’m looking for. Is that the best there is out there?

WordPress support forum (this one) is not about teaching anybody PHP. Sorry, I don’t want to be mean, it’s just a fact. I am not a coder either and barely learned to read basic PHP lines – but can’t write one single line.
There is one article in the Codex about Customizing_Your_Sidebar – but no mention of if_statements, If I remember well.
Maybe looking at the Conditional_Tags will help you to understand the lines from your sidebar.

EDIT. On the main page there is a “sticky” post about how to search the forum.

Thanks for the links. So, where does one learn PHP? I’m concerned that if I bought a book on it, the code might not apply to the specific wordpress themes I’m using.

https://www.zend.com/php/beginners/index.php has some good articles on php.

Tom, I can highly recommend the course in beginning PHP at https://lvsonline.com. I’m just finishing it up and it was MORE than worth the $25 or whatever it was. I think it will be starting again in March.