Was Draco's task surprising?

[snipsnapsnurr]

No: HPFGUIDX 134263

Am I the only one who thought right up until the scene in the lightning 
struck tower that Draco's task was to kill Harry? The idea that 
Voldemort would send a strutting little pissant like Malfoy to 
assassinate the only man he had ever feared never even occured to me. 
The reason I bring it up is because I think Dumbledore thought the same 
thing. The last thing he did before being expelliarmus-ed was to freeze 
Harry under the invisibility cloak. If he had realized that Draco was 
after him rather than Harry, he probably would have done something 
else. Something to defend himself. Also, didn't Harry warn Dumbledore 
that Malfoy would act the next time Dumbledore left Hogwarts? And the 
next time he left, he took Harry with him. Maybe to protect him?

Maybe that was Dumbledore's big mistake. He did say something in the 
cave about old age underestimating youth.

snipsnapsnurr