Lol, I coincidentally took the Pottermore test just yesterday (before the topic came up here).
Our receptionist talked us into it, because she was sorted as a Hufflepuff, didn't want to be a Hufflepuff, created another profile to take the test again with different answers, and STILL got sorted as a Hufflepuff.
She was like, "if you guys take it and one of you is a Hufflepuff too, I'll be happier about it."
Turns out all three of us are Ravenclaws.
Don't feel bad for her, though. We all agreed afterward (herself included) that really, she's a Slytherin who was trying to cheat on the test in order to get into Gryffindor or Ravenclaw because she felt like those had the most prestige.