Ric,
When seating pad/rotors there is significant fluid expansion, much more than in normal driving. Remember, the master is handling the fluid expansion for the whole system including the calipers. Need to leave about a 1/2" below the cap to ensure that fluid will not press out the hole in the cap.
You may want to take a look at the underside of the fender directly above the caps. Often in an overfill condition the fluid will shoot out the top of the master cylinder cap (the vent hole is much smaller than the cylinder bore, hence significant pressure through a small opening) and be stuck to the underside of your body.
I recently broke in new pads on all corners and the same thing happen on my drivers side, however, I knew I was borderline on my fill level (too high) but didn't want to pull the wheels back off to bleed again...I was braking, very near pedal fade and poof - white smoke came off the drivers header as the brake fluid level 'self corrected' and burned off on the hot pipes. Once at the 'corrected' level there are no more leaks.
570 is a good fluid. Really sounds to me like too much in the cylinders.
Brian Carlson
Unique 9122 - 289 FIA - 351W with 8 stack EFI - Formerly known as the "Legendary Spence Car"