I reviewed your account and noticed that you are using the old description editor which is still enabled in some accounts, so I suspect that all (or at least some) of the difficulties you are experiencing are related to the compatibility issues between that editor and some later browsers I mentioned previously.
As such, I recommend updating your account to use the new editor we are offering to see if that clears things up. This can be done by logging into your account and doing the following:
1) Mouse over the "My Account" tab and select "Acct Preferences" under "Settings"
2) Check the box labeled "Use Design Editor v2.0", which is located next to "Default Editor on One-Page Lister" in the Listing Management section
3) Scroll down the page and click the blue "Update Account Preferences" button
Please note that we have been gradually phasing out this older editor for quite some time now and, as a result of where we are in that process, it will not be possible to resume using the older editor once you have switched to the current one.
If you continue to encounter any difficulties of this nature after switching over to the new editor, please contact our Customer Support team directly from under the "Help" tab on our site and we will be happy to continue working with you.