When I start up IB on my 80 all I am getting is the first 2 Cata instances I get none of the old ones yet when I open in the instance finder on my own I see A LOT
Honestly i don't see how this would be a major problem you will get worse gear/xp from wotlk dungeons. Your better off buying cata greens to reach the item lvl and just going with cata dungeons. And if you want wotlk dungeons for cloth or w/e just farm them at 85. Hope this helped
If you Q for randoms with cata @ 80 u will only do 2 instances, but if you manually select inatances you will see the rest Nothing to do with IB
Only reason to do 80 dungeons at 80 is for nostalgia, or if you don't have Cata. They heavily nerfed the xp for toons higher than the zone was meant for. The gear from the cata dungeons is better than ICC25 epics anyway.
read the patch notes ... players above 80 (and this includes level 80) aren't able to queue for wotlk-instances ... no bug with IB