1) TEs are the only position specific goals. You need 100 yards by TEs, but I'm pretty sure 50 by TE#1 and 50 by TE#2 qualifies.
For HBs or FBs (and OL), it's 100 yards rushing as a team. If you get 100 yds rushing by your QB and 0 by your HBs that qualifies. Same goes for 250 passing yards for WRs; it's 250 total so 100 receiving yds by WRs and 150 by TEs qualifies.
2) The side that's closer to the end of the slider gets more. IE (with "X" being the slider bar):
run |XXX________________| Pass - This means very heavy running with little passing.
run |XXXXXXXXXXXXXXX__| Pass - This means very heavy passing with little running
There are only 5 point increments, but it's just a generalization anyway. Setting it at 65 doesn't mean you'll always get 65%, just that it'll be in that general area.