Is the cap leg on the 2nd tone pot going to the outside lug instead of the middle? It looks like it may be, but it's hard to tell from the photos.

Also, is it possible the tip of the red wire poking through the switch lug is brushing the switch body tab? Again, difficult to tell from the photos. And, the hot lug on the jack looks close to brushing the copper shielding in the 2nd pic, but again it hard to tell. Plus, all the ground connections on the back of the volume pot are a touch gnarly, so there could be a bit of noise in there.