Extra line breaks when editing posts

I edited an old post today and noticed that the editing box had inserted extra line breaks. Every line break was doubled, and indeed, when I previewed, I saw that it was going to add extra space that wasn't in the original post. I had to manually delete all the extra lines to get it back the way it was.

Also, I think some of us already know this, but it's worth mentioning. The developer I hired did not start from scratch on the site. He took the old database code and made a significant number of updates, as well as cleaning it up to match today's web standards. We used the site on a test server for several weeks before officially launching it, and we did our best to catch any errors or bugs we could find. After the official launch, new minor glitches appeared, and I think we've finally resolved most of them. Please do let me know if you spot anything else that isn't working correctly.

As for the forum, my developer has not modified or written any code at all. This is a free software package called Web Wiz Forums developed by a company in the UK. Updating from the 20-year-old version to the latest version did cause several issues, but again, I think most of those have been resolved. Nevertheless, any glitches you find on the forum are things I'll have to report to the developers at Web Wiz. That said, I hesitate to call the extra line breaks in old posts a "glitch," as these were carried over from Web Wiz version 7. We are now using verison 12.

That’s why I’m a little hesitant to try. It might cause more harm than good, and it seems like the old posts (anything before April 1) are displaying properly until you try to edit them. For as infrequent as we are likely to edit old posts, I think manually deleting the extra line breaks might be the best way to proceed.