When adding mythbusters to my episodes, i realized that thetvdb.com has "MythBusters", but your software shows "mythbusters" (same ID 73388). Your software sorts this at the end of the list (after Wipeout). And it appears in the poster view last. You cannot edit the series name, so there seems to be no way to fix this.
I assume others could have this problem with improper case series names. I think just sorting the series irrelevant of case will fix the issue. Or let us edit the series name.