I have a list called "ChinesePod" which started behaving strangely today; I added a large batch of new words, which automatically created a sublist called "March 2012". No matter what I do (including deleting and re-adding the sublist) the list refuses to add new words; I've changed the settings to add starting from that list and saved them several times but each time when the page reloads no change has happened (i.e. the list isn't adding, is just being ignored). Any tips?