Re: question about wiring
The DD in that guitar is definately wired incorrectly. Remove the red and white wires from the volume pot terminal but leave them soldered together and tape them off so they can't contact the guitars electronics. Solder the black wire from the DD to the volume pot terminal.
Be prepared to have a really loud and agressive sounding guitar.
Artie is right about the heat in the cavity. That is seriously not a good sign and if your amp is sending enough juice to heat the guitar you better get it looked at. the thing is though that if your amp was sending current out of the input jack your amp would either not make tone or you'd have serious noise issues involved. The hot guitar was probably caused by holding against your belly for too long.
While I doubt it is your amp, if it is you amp the current used to heat that cavity might be enough to hurt you if the current finds a way to ground through your body. You better figure out what your problem is.