Non-current displayed when "current only" checked?

I'm trying to nail down exactly what causes titles/productions/prod seasons/perfs to display in the "Maintain Production Elements" screens when the "Current Only" checkbox is checked.

We currently have a Title/Prod/ProdSeas/perf combination appearing when that checkbox is checked even though the perfs are in the past, off sale, and the associated season is inactive. So, what is causing these elements to remain "active"?

Thanks.