Windows 7: WMC won't automatically delete shows

I set WMC to only keep a certain number of episodes, (10 or less) then to keep 'Until space needed." However, it keeps recording episodes. For some, I have 30 or more episodes. I have to delete them manually by leaving WMC and doing it through Windows explorer. How do I set WMC to only keep the number of episodes I specify? I have a Ceton infiniTV tuner card, if it matters.

Well, the Ceton card certainly has nothing to do with this matter. It's a WMC issue.

Apparently this problem's been around for years, and just doesn't seem to work as you'd expect it to. I'd try "keep latest recordings" instead of "keep until space needed", along with your "keep up to 10 recordings", but reports over on the official Microsoft-supported WMC Forum have for years complained about this problem and there does not seem to be any change in WMC functional behavior even in latest Windows 7. So it seems no matter what settings you specify, WMC simply doesn't seem to be trimming the recordings to meet your KEEP and KEEP UP TO settings.