Well, obviously, because there are such things called priorities. Firstly, I'm not convinced we even need a third striker. Secondly, I'm not convinced Falcao fits the mould of a third striker (read my post a page or so back about why I think so) and thirdly, according to Mourinho there'll be a couple of signings to keep some players on their toes - if one of them is Falcao, it means we're not going to be improving those other areas that need it more.