Hi Jon I have the same breakout board with the same problems the board is inverting the signal sent to the parallel port, I have just received another one I ordered to see if this would fix the problem, but I think if you are finding the same problems then it is not going to cure the problem.
I also had to put the step timing in the motor tuning menu to 5uS to get the stepper motors work, I'm using 542 stepper driver's.

I will post if the replacement board cures the problem when I fit it tomorrow.

HTH