coachm - 12:13 am on Dec 5, 2009 (gmt 0)

If I recall, some parts of their interface are confusing, since each section on the page has a different save button, so it's easy to not save your changes.

BUT, that said, I KNOW there are bugs with the refinements tabs and where sites appear and don't appear. So, ya, it's possible you hit a bug. But I haven't seen that specific one.