I think the latex problem is due to browser caching. If your edits do not appear to register changes to the latex, try reloading (perhaps even a few times) to see if your revisions eventually turn up.
If simply reloading does not work, you might want to delete your cache and then reload the page. That should be enough to eliminate caching altogether as a potential problem at work. If the problem still persists, I'm at a loss to suggest what could be going wrong.