I was "confirmed" to perform a show and I wasn't on the performance list with a result. I'm not to sure what's up with that.

What group and what show?

You know, I had that same problem too. It was on July 4 with "Drums of independance" hosted by jets. My drumline in Line of Distinction

I believe this is happening when an event is already scored, and then the event host confirms groups after the scoring has taken place. The acceptance page is still available to the host until the end of the day, so you get confirmed but its too late at that point.