Talk:Muggles' Guide to Harry Potter/Major Events/Infiltration of the Ministry of Magic

At the end, it says:

"The only reason for the Trio to abandon Grimmauld Place at this point is a belief that Snape is somehow unable to reveal the presence of Grimmauld Place, and so Yaxley, aware of the place, represents a threat by himself. While this is a correct judgement given Snape's actual loyalty, neither we nor the Trio have discovered that, and so the decision to abandon Grimmauld Place seems ill-advised."

But there is a jinx/spell against Snape, isn't it? When the trio enters Grimmauld Place No. 12, there is a figure asking, "Severus Snape?"...