General Motors (GM) Co-Op Student interview questions

I went to a co-op employment fair at my college and was interviewed by General Motors. Soon after, I began receiving emails with instructions on how to officially apply for the job online, because that needed to be done in order for GM to put me on file, or something of that nature. While doing this, however, I ran into a few problems. If I remember correctly, the automated system that I was using to apply for the job was not giving me the option to apply for the position that I was being instructed to apply for. Instead of giving up, I continued to contact the HR representative and share what troubles I was having. Eventually they just had me apply for a different position so that they could receive import credentials. I have a feeling that this was done on purpose. My thought is that the issues that I was having with applying were set up as an test of persistence, to weed out all of the people who gave up as soon as they started to have trouble. I could be completely wrong about that, but my advice is this: be persistent. Show your employer that you truly WANT the job. That advice is good for all potential employers, not just General Motors.