I think I recall that if you install SP2 after SP1, Obi defaults that to be your primary SP, so when you hear a dial tone it's from SP2.
This doesn't explain why PP is still working after you removed it from SP2 though, unless some traces are still around in SP1. If you got Obi to do the GV installing into SP1, maybe it left something of PP in there. Try looking around in expert mode.