FWIW, I had problems with duplicate shelves after I updated to 2.4 (I think - it was the Dec./Jan. firmware release). I was able to get rid of them by doing a factory reset. Logging out and in on the device did nothing in regard to the duplicate shelves. I'm assuming that because I was able to get rid of the duplicate shelve with a factory reset that I acquired them in some way other than the server issue.
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