Native Instruments Software Test Engineer interview questions

A phone interview followed by a take-home assignment. The folks in the phone interview seemed nice and friendly. Unfortunately, when it came to the take-home assignment (a two-part assignment), it was the opposite. I completed one part of the assignment, but I emailed them asking additional clarification on the other portion. After 2 days, they emailed back saying that I didn't make the cut. I'm guessing that was part of their criteria: If you didn't understand their poorly written assignments, you must not be good enough to work for them.