It's because of your moving pictures logo in the top of your descriptions.

If you can work out what part of the HTML code is that part and remove it or replace it with a static logo then apply it to all listings you will be ok.

For example if you go to revise a listing and select HTML at the description you then copy n paste it into a graphics HTML code converter tool you can then change the moving logo to a static one or remove it.

Then re-apply the new HTML code to the listing.

And you should be able to bulk edit the description to apply the new code.

It's not too difficult if you are good with computers but a little complex if not and perhaps getting a web graphics person onto it may be a good idea. It doesn't matter if it is not the original designer, this change is very quick and easy for a pro.