TheBlackKnight on "idwutil_600.exe"

Hi everyone,
well this is not really a problem, but I'm just curious to know if anyone else is experiencing this and know why:
If you check in Task Manager in windows you will notice some processes called idwutil_600.exe. Time ago I used to see only 2 of them running and in fact my transfer speed was very slow. I can see 4 of them now and speed has doubled. Anybody knows why I sometimes see 2 and other times I see 4? Does it mean when I only see 2 there's a problem?
Thanks guys