General Motors (GM) Senior Java Developer interview questions

Applied online and it hardly took couple of business days to get a call from HR, I was asked the routine questions like if I was willing to relocate, why was I looking for a change, what I was earning at my current job e.t.c and finally what I was expecting...and they said what I requested was in the pa range and they arranged me with an telephonic interview. I get this call and before the interviewer gets technical he explains as to what he is looking for in the potential hire. In the technical round I was asked all sorts of questions starting from basic to all the way to the architect level..was not very sure as to why I was asked architect/Lead level questions for a "Senior Developer" position? I thought may be he was just trying to know me or something but it turned out the HR had submitted me to Lead position without even my knowledge. It would have been better on the HR part to submit for the position that I applied and this seems to me more intentional than accidental for reasons that I can suspect.

First they emailed me stating that they want to talk to me, I gave them time. When they called me, all of sudden it was phone technical interview.They asked very very simple technical questions on phone interview. I was surprised as it was unexpected. I gave them phone interview anyway, and it was lasted 45 minutes. After 2 hours, they really liked in phone interview and they want to proceed with face to face. They scheduled day and time with me. During face to face interview, they asked 99% behavioral questions. I was surprised.