I know as much as you guys about this incident but.
2 out of 3 rafts flipping? And then one raft trying to take 11 people on board? What's going on here?
I have had 13 people in my raft before after cleaning up another rafts flip, if the guide is on it they can get everybody pretty quickly. (7 from mine and 6 from the flip)
Yes the raft is not designed to hold that many people but you are going to bring them onboard instead of let them float on down the river.
I know a guy who had something like 15 after a flip once.
So it is entirely possible the second raft cleaned up after the flip and then something happened and he flipped.
On some sections of river and water levels you can see rafts flip left and right, pre 95 flood on the ark siedels suck hole was an amazing rapid at 1300cfs. You could sit down there and watch an entire 10 boat trip come through and all but one would flip. oh the good old days.