Schweitzer Engineering Laboratories Software Engineer Intern interview questions

I applied through the company's website. I was then contacted via email to schedule an HR screening interview. This was followed by a Zoom interview and an offer which I accepted

First interview was a phone interview. The interviewer was a manager who was working on some sort of online reporting service. He asked a series of non-technical questions which had to do with why I was interested in the company and what my career goals were. He told me that he would follow up with an on site interview the following week. When I arrived for the onsite interview, I was surprised to find out that the team I was interviewing with was completely different than the one for my phone interview. This panel asked me a series of technical questions involving inheritance, and finally some complex type definitions. Very odd.