When my map starts for a second round, so the last has just ended and all people a thrown back to the rr (exept onos, but thats another problem) after around 8 sec in the rr all people are turned 180° around, so if you are running you just run in the opposite direction, sometimes this happens multiple times ( i believe)
So is this normal, or if not wjat causes it and how can it be avoided?

I think i remember seeing XP-Cagey saying something like "... by the way, the orientation of the player spawns now does matter ..."

It may be related. I got that when playing on official maps as well. You run to the join marines sign and... poof you suddently face a wall. Maybe the feature isnt working as intended and/or fully/properly implemented yet.

Consider it "normal", till they fix it.