Did i missed something about Diremaul West in Retail

I came back to Retail an wanted to quest in the Timewalking dungeons, so i grabbed myself as a Blood DK and went inside.

Diremaul West it was, allright no problem, time to kill the crystals up and then get the demon and the nightelf downstairs.

Well that was the plan. So i went down the usual path i am used to and wanted to go to the optional boss kalendris before you go up the stairs to the crystalwalk mage and shaman said we can skip that one and i understood they meant the boss, and i understood that and wanted to go straight up to the crystals... i got a kick and a 30 min derserter debuff with a "we told you that we can skip that"

Did i missed something? I did it like that for like 15 years and now i do something wrong?

What the heck happened? And how are you "supposed" to run Diremaul west now?

I am hella confused