When you manage an addon, can you please include the text area tools on the donations tab? You know, the tools to change fonts, styles, format, links, etc.
It's not a bug, we use vbulletin's message editor and it can't be loaded more than once the way its written. I would have to put the changelog and donation page on its own separate edit pages.
Changlog however you really don't want to format it too much if at all with bbcode.
Once we re-write the site we will be switching the message editor to something more robust.