[rattle69]

If it has the bleeder on top and bottom then it shouldn't matter what sides. I usually track down the problem by pinching off the rubber brake hoses. If all are pinched and the pedal is still soft then you know that it's a problem from above like M/c or booster. If you get a rock hard pedal then you know the problem is from below. Release one clamp at a time to track down the problem. Anyway hopefully the shop you brought this too is good at tracking stuff like this down. Good luck

Burnishing goes a long way with bbk's. I've had soft pedal for quit a few stops until pads were broken in after bbk installs. This has had me wasting a lot of time bleeding in the past as well.