Yes i did use "Bridge" ... "Appending" those polys fixed the problem but what's the difference bettwen "append" and "bridge" inside maya ? Why do "Bridge is not smoothable correctly pressing the "3" button ?
Basically bridge in maya is a little silly and you have to not select the edges at either end of what youre trying to bridge or else it wont merge them together. If that doesnt make sense, i tried making this picture to explain it: