In reply to Mattwaltno123:
I've got mates who have done this. Did the bolt-end krab come completely off the bolt or did the tape slide off open gate of the bolt-end krab leaving the top krab on the top bolt? I know of cases of each. From the position of the gate I suspect it's more likely you fell when somehow the sling was on the gate of the krab, that opened it and wrenched the gate open, but in that case I would expect the bolt end krab would have stayed on the bolt or fallen to the floor, while the tape and rope-end krab would have still been on the rope?
If the krab was still on the tape, so therefore attached to the rope, its more likely somehow the krab caught on the bolt and got levered open, so just came of the bolt. It's less likely to happen with plaingate keylock krabs but I'm sure it still can!
You're unlucky, but statistically I suspect it's not that uncommon as taking falls is such a normal part of sport climbing,