Moonie! 
I am glad that the Smurfs are finally on your Cartoon Network!
I can recall a few different intro themes for the Smurfs - the one I grew up with is *not* the one they play on the US Cartoon Network - even what Gargamel says is different...
I imagine they try and play the shortest version of the intro to maximize the amount of time they can run advertising and promo spots, in addition to allowing "time compression", as Vic Twenty pointed out...