Sprites Rotation Off Slightly, Causing Gaps In Map

ok, this is a weird one. i’ll let the pictures do most of the explaining


the selected sprites rotation is off, slightly, but enough to cause blank lines and seams.
As you can see, the position and rotation are fine, but notice the tiny black line at the top left of the selected sprite?

This doesn’t happen at 0,0,0 rotation.
I honestly have no idea why this is happening. Am i being thick?. i don’t have anything modifying the rotations or positions.
Any help?

are you sure that’s not the standard default grid? Does it happen in play mode as well?