USAA Intern interview questions

Spoke to a recruiter at career fair in early Sept., applied online through my university the same day. Was contacted for a phone interview in mid-Oct.. This was normal, they asked me: why USAA/this job, my favorite class/the greatest insight, a time I worked with someone difficult, a time I was presented with a lot of info and had to make a hard decision in a short amount of time, and 3 things I want an employer to offer me. 10 days later, I was invited for a site visit that would take place in early November. We were in a hotel on the Riverwalk and invited to a conversational dinner with USAA employees. Here is where things turned negative. One of the employees arrived, introduced himself, then started talking negatively about a former co-worker who had left to a higher position at a competitor. I had him the next morning for my interview. He started with a normal question (why I like math), then asked about me. I transferred universities, and for some reason he thought I graduated from my former institution in a year and was now in my masters at my new school. My resume clearly stated I was at the former for a year and am still in an undergrad program. He spent most of the hour asking about computer science and whether I knew about some very specific topics in regression (when I said no, he backpedaled and said "oh never mind, that's a graduate level topic"). I'm an undergrad math major (as were most candidates) and I asked an employee at the dinner if there would be technical questions. He said it would be mostly behavioral. My interviewer's questions just seemed out of place, especially compared to other interviews I've had for similar positions this semester. In the last 10 minutes he finally looked at my resume, saw I was an officer for an organization, and asked about teamwork. It was frustrating... especially when another candidate said they just had behavioral questions/were asked to walk through a project. To top it off, after he stated that his family was from a country near that of my own background, I told him where my family was from. He made a derogatory comment. My site visit was less pleasant than at a competing company, where the same 4 employees interview each candidate in 4 separate interviews. I've accepted an offer from them. At USAA, 12 candidates each met with a single interviewer and each interviewer met with 2 candidates. USAA would have been excellent given the dinner, hotel, nice phone interview, incredible office, etc., but my final round was the most bizarre interview I've had.