Could be a few things,
1. Master cylinder, could be bad, the rubber seal inside the master cylinder could be bad. This is the problem for the pedal feel
2. the brakes still need to be bleed more, check all fittings,(loosen and tighten all of the points to insure that they won't seize and to make sure that they are tight and do not leak)
3. The pulling to one side is because the lines have air in one side, or that one side sticks, you did check pads for even wear right?