Equinox, CTC can be tough at times... and sometimes even the best prepared fail at the easiest tasks due to nervousness or whatnot.
I failed my Stage 3 about 4 months ago and got reinvited back, it turned out that I failed one of the team exercises due to being nervous, it actually happened in the second exercise, you see? I thought I had done bad on the first one and really tried hard on my second one to accomplish the task and I kinda stopped worrying about the team vibe... They sent me the feedback and I was sure I was going to get something about my interview but to my surprise it came out perfect... my interview was flawless.. I studied and prepared myself and it paid off and even though it all went ok there the team exercise doomed my chances of going to nursling for phase 4. Next time I try I will leave the nervousness behind and act like a team member.
Maybe that was what happened to you?
-Polorutz