How the hell can Tiger Woods be #1 again . . .

when he hasn't won a Major to get back there?

Exactly......

Probably for the same reason Lee and Luke got there, all down to being consistent and he has this year, even allowing for his eratic driving and some crap putting. It also helps when the above 2 players are not playing well, plus Rory playing like a love struck amatuer who's just found out about legs and heels