brakes not working right

Check to see if your compensating ports are returning fluid.
There can be several reasons for fluid not returning;
1) as mentioned, a too-long pushrod
2) a pedal not parking properly
3) failing brake-hose(s)
4) faulty seal retraction
5) stuck rear wheel cylinders
6) brake shoes not parking
7) a faulty Combination valve
8) dirt in the system, plugging orifices.
9) kinked lines.
10) interference from the park brake.