RDF HC dungeon lockout

I've been doing some tanking and I seem to be getting multiples of the same heroic dungeon. Today I did FOS HC twice, POS HC twice and HOR HC twice, yes, all were heroic difficulty, also I did not play around the raid lock reset time. It was in the middle of the day, the dungeons had not reset. They were locked and then I got them again and did them again, loot dropped again. What's up with that? I've noticed it more when tanking but I think it has to do with shorter queue times for tanks because I can do more dungeons and it's easier to notice when a HC dungeon repeats. I play on Lordaeron btw.

do you realy want them to fix it tho? ^^ think known bug since molten times already

You were meant to be able to do the same heroic even if you were saved if you used the RDF tool. It was fixed recently.