Cutting out Windows - different results?

[....]

Was there something in the patch - i have something weird happening now i had never before.

When i build a rough stone block wall and cut out a window:

2x2 Blocks to cut
Window then is 2 2x2 blocks wide and 3 2x2 blocks tall

BUT - since the patch - at least i havent had that before some windows become weird - normally you will have those stones on the top that will make the edges somewhat round - now rather randomly i sometimes dont get those and get more square windows.

Is there a trick im missing to switch between these results?

[....]

Normally they looked like this:

XXXXXXXXXXXXXX
XXX=========XXX
XX===========XX
XX===========XX
XX===========XX
XX===========XX
XX===========XX
XX===========XX
XXXXXXXXXXXXXX

Sometimes now they look like this:

XXXXXXXXXXXXXX
XX===========XX
XX===========XX
XX===========XX
XX===========XX
XX===========XX
XX===========XX
XX===========XX
XXXXXXXXXXXXXX

[Storm Reaver]

You'll notice something when you have SNAP on. Every tile has places to snap the walls on the edge of floor tiles. But when two floor tiles are next to each-other, each tile has a place to snap those walls. So you can actually snap walls next to each-other.

One of those walls has the detail, but the other doesn't. So moving your window over one tile will change the outcome because these seem to be preset.

[....]

Yeah i think thats it.