Microsoft Intern interview questions

I got an email from a recruiter asking to schedule a phone screen 10 days from then. I had apparently submitted my resume to their system awhile back and completely forgot about it, a pleasant surprise! The phone screen was pretty casual and I noticed that the questions all seemed to be design related. I think I was being interviewed for a PM role but they say you're considered for PM, SDE, and SDET. I fumbled a bit on an "explain such and such to a ___ year old" question but I did really well on the design question. We ran out of time and I thought that I had failed because of that earlier question but the interviewer seemed pretty upbeat. I was told to expect the results within 2-3 weeks. I waited almost the full 3 weeks before I got an email congratulating me on making it to the final round. I'm still waiting for them to schedule my interview. It's been about a week since I received that email.