A few people have been reporting problems when initially posting, and editing threads. One glaring problem here is that you've neglected to wait the required 2 weeks for relisting your item, thus breaking the exchange rules. Despite this specific problem, there is far too much of this behavior going on across the board. You also are not taking advantage if the fact you can post a link to your sales thread into your sigline. In any case, once you list an item for sale, you have to ride it out for 2 weeks, that has been the rule going on years now. Because of the fact people couldn't wait 3 days and decided to relist their stuff every day. Also, bumping won't do you any good really, it's been disabled again due to impatience and abuse.
Spark is aware that there is something going on with the session (time logged into and posting on the forums), and I'm sure he working to try to get it fixed. THe fix though, might not be as easy as we may imagine. Moving forward, if you have trouble let us know and we can try to help, otherwise, we end up having to clean up new threads when it is not necessary.
Try to clear your browser cookies, temp files, etc Log out of the forums, reboot your device, then log back in and make your edits.