I thought this was a problem localized to RussianPod101, but I see I'm having the same problem here as well.
I tried to configure my MyFeed to essentially only pick up the short lesson Reviews and the abbreviated Dialogue tracks. I get the Reviews fine, but the Dialogue tracks (again, the short ones -- not the full-blown ones) aren't showing up to the party.
I know it must be a valid option, or you wouldn't have a checkbox by it.