OK, you got a couple of aerodynamic problems.

The chord of an arrowhead's blades is very short. And it's speed is very slow. So the Reynold's numbers are small. So small that the blades really aren't working like an airplane wing, even an average size model airplane. Your blades might be working like park flyer wings do. About any planform wing works for them and about any airfoil.

I'd suggest the blades that're advertised to be non-planing got that way from cut/try engineering. If they actually do anything at all unique, that is.