GBPVR sometimes does not want to use second tuner

[gabeweisz]

I have 2 tuners in my box: one Hauppauge PVR-150 and one Hauppauge PVR-150MCE. One of them is hooked up through a cable box and uses an IR blaster, and the other one is hooked up directly to the cable. They have the exact same lineup, except that the one that goes through the cable box also has HBO while the other one does not.
I've only had GBPVR set up for a few days so I haven't established a pattern to the problem, but I've noticed several times where I've been recording one channel and tried to watch another channel (that both tuners have), and it's told me that no tuners are available for watching live tv, or I've tried to schedule two recording at the same time (one with HBO and the other on another channel) and if I don't choose the HBO recording first then it will not let me record both at the same time.
I'me assuming that, because both of the cards are essentially the same board, that I need to have one of them set up as board #1 and the other as board #2. If so, should I switch them around so the one with HBO is board #2 (so it will use the other board for recordings first)? Would doing that involve swapping which PCI slots the boads are in (if I want to actually swap #1 and #2 and not just switch which one goes to the cable box)?

Thanks for any advice.