I did as well, but I got careless and deleted one that had the completion of Freedon Nadd's tomb on it. Like I said, I've learned a valuable lesson from this. :/
Yep, this also happened to me on my first try. It appears Kavar should run into the chamber and cut these 2 into bits, but the cutscene didn't trigger for some reason, leaving them standing there in the blue...
(Note that this "Failing of Kavar's Cutscene isn't the reason for this bug, as I did have these 2 blue guys over there, but not your problems)
Try to find "Captain Riiken" somewhere and have a chat with him, as he is supposed to be talked to after the battle and convo with Kavar...
Ah, explains the Guard then.
I gave it a shot, but all Riiken does is tell you to hurry and save the Queen. Thanks though.
I get the feeling that this trigger isn't going to fire for me unless I redo the Palace. I'm going to hold onto my current save in case another solution comes my way, but hope for that is rather sparse. Again, point taken and lesson learned about game saves. Thanks to everyone for your help anyway. : )