I use the Lasky Sharpener, and the angle marked on the guides is included angle. If you use the 30 degree hole, if that was the angle of the stone to the blade, then the included angle would be 60 degrees! That's the edge of an equilateral triangle, and not even an axe would be sharpened that bluntly.

One thing you need to be careful of is that the blade is clamped down straight. If it's angled either way, then the bevels won't be even on both sides.