Mass effect: Missing survey team?

I've gone to the site read the computer logs, gone into the excavation and killed the 8 Husks or at least I hope it was all 8 they charged me and I didn't bother counting while I was fighting. and now I'm left with nothing to do. The cave is empty and there's 2 doors at the back that are locked and a caged looking rock in the middle. I've walked all around the cave and nothing shows up as interactive, and NO 11 extra husks attack. please help thanks. I think I've glitched this mission.