1999 Oldsmobile Alero soft brake pedal and car is slow to s

We replaced front/rear brakes pads and resurfaced all rotors. We also bled the four brakes. The car has a soft pedal all the way to the floor and stops very slow. I can not do an emergency stop and the ABS will not activate. I do not have any warning lights on.

I discovered that the front right brake caliper piston seal is broken. I will be replacing this caliper. I also noticed some minor leakage at the brake booster/master cylinder mating surface lower edge. There is vacuum at the booster.

I doubt it, but could this possibly be what is causing the above problems?

I was a GM Project Manager, but now unemployed and doing odd jobs.