" I still don't get the "Offensive Pass Interference" call against the Seahawks (when they did get the ball into the end zone.)"
I am amazed there is controversy about this. It was a CLASSIC pushoff. Receiver and defender moving in one direction, receiver reverses direction, pushes against the defender and goes back to receive the pass. The push wasn't very hard but it was obvious.
And the Ref was standing right there.
The Steeler defender was also clutching Jackson as well. I've seen defensive pass interference called for less.