I watched the episode Within last monday. When Shannon has found much evidence that Skye has to be the Sixer spy Taylor says: "I got a man inside the Sixer camp. I'm gonna get to him and see if he can confirm that it's her."
Well, why didn't Taylor contact his spy to tell him who was the Sixer mole in the first place? Taylor wanted to identify the spy as soon as possible. Certainly when he found out in Now You See Me that Lukas was coming closer and closer to an answer and that the 11th Pilgrimage was nearing.
And while he was at it, couldn't Taylor's spy tell him the location of the Sixer camp and attack them?