Hi Ed, so yeah what actually happens is that Loft internally generates one single long surface initially and then if there was a uniform segment count in the profiles it's divided at the segment endpoints in the profiles direction and then additionally at any areas where there are creases.

I've got it fixed up for the next release so that with Loft style = "Straight" it will make sure to additionally split it at any internal knots in the loft direction so that coplanar areas will be divided too.

Thanks, - Michael