Bugged quest in BFD?

There is a quest called Amongst The Ruins, which takes place in Blackfathom Deeps. There is a boss who gets summoned called Baron Aquanis. Now being a Rogue I've solo'd this quest in Classic because the reward is a really nice 1h sword. When I tried to do this on Icecrown, it summoned multiple Baron Aquanis' and I died right away.

Is this working as intended? Is it some kind of preventative measure to stop Rogues from soloing this boss?

I hope this is the right place to post this I didn't see a bug report forum

Thanks

It's a bug certainly.