I have moved several TV shows from one of my personal lists to another; that is, I have removed them from one list and added them to another. After a while all the shows are reappearing in the list from which I have removed them. So far they have been removed twice and reappeared. I have now removed them a third time and fully expect them to reappear again. I am guessing this might be a synchronization problem.
I have also removed items from my Watchlist and seen them reappear there multiple times.
This is obviously a fairly serious and annoying issue,
