Why is Carlsen so weak against 2500-2600 players?

Surely, yesterday's draw in the Carlsen-Batsiashvili is the top news from round 1 of Qatar open, but I guess, that many of chess players could predict such a hard start of Carlsen. It's simply unexplanable, why he is so "weak" against 2600-around players (it happened so, that even against 2500-around). I thought, that on the top level such problems should not exist, but they do! http://www.chessbomb.com/arena/2015-qatar/01-Carlsen_Magnus-Batsiashvili_Nino