"No Books" in Random Collections on PRS-300
So I just got a new PRS-300 last week and for some reason maybe half my collections don't display right. Some work as expected but others, once transfering with Calibre don't work. The group for the collections will show up on the reader but say "No Books."
Some other series that are the same format and have been tagged in the basically same way show up fine. Is this some weird database issue I'm not aware of? The books are there and show up by title/ author but not by collection.
Any ideas or experiences would be helpfull.
Also, If I tag the books as well, which I usually don't do for the collections, the exact same thing happens.
Thanks in advance.