I don’t know if it’s a glitch, but I’m missing The Ultimate Fighter entry from the calendar. It was there earlier (2-3 hours ago), the download started via torrent, the air date was then erased and therefore the entry in the calendar also disappeared. Really odd. It also happened for Hell’s kitchen (the second episode).
I’ll keep a close eye on this, to make sure it doesn’t reoccur.
The air date was changed on tvdb and recently updated in Sonarr, there is no other circumstance in which that would happen.
Ok, the only thing that seemed weird is how would it know to grab the show if there was no air date at the time? I’m really sure I saw the air date there a few hours ago, or else I would have not reported it. 
As I said, I will keep an eye on it, just to make sure it wasn’t my imagination lol!
Air date is only required when the series is released using the air date instead of season and episode numbers.