Foundation Center Special Data Project Associate interview questions

Someone called me to request an interview and the person told me if I had some time to talk. I replied I was walking in a busy street and I can call back in a few minutes. She said that's fine but she failed to give me her extension number, she just told me her name, which I didn't hear very well. When I called the number back later, I had a difficult time at first using the directory to find the person that called me. The interview was scheduled for a week later, but they decided not to interview me after I spent 1 hr there because I failed to detect 7 errors in a document as part of a proofreading exercise, the maximum allowed was 5. Even though I got all remaining errors correct (15+) and I was well qualified for the position. The good news is I was offered 2 positions from other organizations within days of leaving the interview site. And I'm very happy in my current role. Though I liked the Foundation Center, I wasn't very excited about the position. I was frustrated at first but not being interviewed ended up being a blessing in disguise.