Bad URLs with SESS ID code added to permalink

My blog is https://momreviews.net. I ran a Crawl using Google Webmaster Tools, and it came back with 227 errors, spanning back several months and several previous versions of WP. I don’t know if this is a WP error, a theme error, or something else, and I really hope someone can help.

All of the URLs which return a 404 error look similar to these:

https://momreviews.net/2007/04/07/the-o…SESSID=666e581c4a88e8020944ecac26de74ce

OR, like this:

https://momreviews.net/2007/08/11/please-help-me-walk-for-a-cure-for-alzheimers/EZSchoolSupplies.com?PHPSESSID=7acaa3211d9d73ec6eea9ec3a2d1b06c

The first example just has the SESSID code added to the end of the permalink, the second example has the URL for one of my sidebar advertisers added to the permalink, and then the SESSID code.

Does anyone have any idea what I need to do to not only prevent this from happening with future posts but also how I can fix all these errors? I’d prefer Google to be crawling my correct URLs!

Thanks!