Sorry, but another brake pedal question

There are 3 stops. The pedal coming up should be stopped by the brake lamp switch, though something is wrong if that is what stops it. The rod should be locked into the MC piston by the afore-mentioned rubber bushing. The MC piston should not be able to come out of the bore due to a clamped on stop, which is either a bolted on tab (usually temp for power brakes) or the dust bellows w/ sheet-metal flange. The later might be what post 15 refers to. Either way, it is a serious safety issue, and that mechanic should never be trusted again. Still waiting for photos.