X Software Engineer interview questions

I was contacted by an internal recruiter and agreed to interview. A phone interview was set up by another person, where all of my personal information was incorrect, so I had to confirm my details. This was a Skype interview. After I passed the first round, another phone interview round was scheduled, where again, my personal information was incorrect, so I had to confirm again. This round was also supposed to be over Skype, but the interviewer called me on the phone instead. Both rounds had fairly easy questions with collaborative coding on the web. I knew I didn't make it after the second round, but haven't heard back from the recruiter after that. Overall, the interviews themselves were fair, but the organization was just absolutely terrible.

One technical interview, asked me a tree related problem, not solving the problem quickly enough, failed..