Ok, new development. I swapped lenses, got 1000 on the screen, advanced, nothing, swapped to a different lens, got 1000 again, was able to fire the shutter and advance, then nothing again. Swapped to the first lens again, now I get P and was able to meter and fire off a shot, then nothing again. Swap to the 2nd lens, getting the ability to take a shot again... You can see where this is going. So this is what's happening. I don't think I want to have to change lenses every time I want to take a shot.
Any insights?
Thanks gabriel, I did actually know about the 1000 for the film advance. I'm pretty sure this runs a little deeper though.