Those are bad pads to hack. The directionals ghost once you hack them. I wasted several of them before I figured that out.
That isn't just my experience either. I read somewhere (this board maybe, a long time ago), that someone apparently emailed them about it, and it is a known issue with those pads. They work fine as pads, but once you wire up those directionals with wires and microswitches they get wacky on you.