It's just one of those little problems that need to be fixed. They use a fixture to rout out the holes, and it was probably misaligned.
If you sell that many kits, it is impossible to check them all to perfection. I had a Kingcat that had the two wing tubes not parallel to each other. It was more difficult to fix, but It was fixed. These planes are really critical about alignment, and most of the time they are fine. I should also mention that I built two others that where perfect.

Dan