It used to be that every instance of a rerun would NOT be recorded if it had been recorded recently, especially if it was still on the DVR. Lately, I've been seeing every instance being recorded, even if multiple copies are still on the DVR. Examples are Red Bull Air Race on Fox Sports 2, and Lost Girl on SyFy. (This one I briefly had to set to "new and reruns" because the original air dates on first-run episodes were the real first-run Canadian dates, rather than the American ones, so new-to-us episodes weren't being recorded. They've since fixed it so that the first run gets the American date, and the reruns get the Canadian date. )
I have S520, although I started noticing it before that.
I have S520, although I started noticing it before that.