Recently I tried to import American Dad and Spider Man into the library and it split the Spiderman show into three seperate "show icons" in the series view with each season and split every episode of a few seasons of American Dad into seperate show icons in the series view. By show icons in the series view I mean when you select the shows tab under Video and a thumbail is displayed for each series, instead often individual episodes are listed or the seasons are split up.
In some cases it fetches the incorrect information as in switching the information for S01E01 and S01E02 or only retrieving details for half the episodes in a season.
I have tried renaming so that all the episodes/seasons have a similar name structure but it did not help, I also tried removing from library and re importing it but it did not work after the rename, perhaps it is retaining the data? I'm not sure.