Hey HappyMat

Dont fear the SubD way, I use them all the time!! Its just subpatches that you've got there because of the triangles, if you look closely they have tesselated to four sides, which is how they would look if you convert to poly on a higher level of faces. I can also happen on any subd surface with four sided polys too. Its only where the edges want to join to another edge.

_J