I think there might be a code problem. Some themes have a short description option at the top. Which take the starting part of your description and show it on the right side of image gallery.
So i would like you to do a test. Just make an sample listing and add a lot of random text in it (Not just one paragraph). and then see is the first description is showing fully in the description. of just a little part of your description then let m know.
I see the problem and I think I can help you to fix it. If you don't mind, please create staff account (please make sure you grant me to edit the theme, see tutorial here) for this email: email@example.com. I'll take a look.
Hop you doing well.