It's the position of the pattern on THIS board where the distance from the left end of the cut out is TOO Close to the left end of the board and like said above, the board lifts when out from under the roller and the tracking gets messed up.
A FrugAL fix for this is to tape a small section of cut off board on the end AND move the pattern and cut out to the right... On the Screen in Designer, the tracking roller is on the TOP of the screen so you move stuff to the LEFT on the screen. I draw a 4 inch box on the designer board then keep the art to the left.
I ALSO use Place on END or Corner rather than center on board.
AL