I needed one more extra base hit and ...
With no one on, I hit a stand-up double, but the official scorer decided to give me a single with advance to 2B on FC! The RF threw to 2B as cutoff in the outfield who in turn threw it to SS near the base after I was standing on the base. That was definitely a double!
Next at-bat, runners on the corners, I hit the ball off the wall deep into RF/CF gap more towards center, the runner on 1B decided not to run to third even though it was definitely not going to be caught. So again, I got screwed out of my second XBH to complete the mission.
Moments are still very frustrating!