I figured it out. I took the left entrance to slalom, but in my brain, I thought I took the right entrance. So I did the exit wrong.

Somehow I went off course on runs 1,2 and 4. But from the times that I heard, the 3rd was still my fastest. But I got videos of all 4 of my runs, and I can't for the life of me see where I went...

I'll be there around 845.