Hi,
It seems to be related to shows with early release dates not showing up in the calendar. Ascendance of a Bookworm’s case is happening because TMDB lists that show differently from other datasources (so the season 2 dates are wrong).
I’ll ask a developer to take a look next week.
The case with Ascendance of a Bookworm has now been resolved but Witch Hat Atelier still seems to be missing for previous dates but can be seen for future dates.