Date Filter Problem?

I installed PT3, created a new database, imported a load of hands for this year. It has them in correctly, but if I try to filter for this month only, it shows my hands for the year so far, not for just this month in the General/Player Summary tab. Am I doing something wrong? This is in FTP, and the winnings tab dates the hands correctly
Edit: Here's what I mean - some of it works, but not all of it. For example, this image shows it listing 65k hands (which is what I've played of all imported hands, not of the filter), in 14.43 hours (which is the amount I've played that limit this month - i.e, what I've filtered, but obviously not how long it took to play 65k hands)

Edit: Here's what I mean - some of it works, but not all of it. For example, this image shows it listing 65k hands (which is what I've played of all imported hands, not of the filter), in 14.43 hours (which is the amount I've played that limit this month - i.e, what I've filtered, but obviously not how long it took to play 65k hands)