Recently, we had a job where 2 of these notches (identical in size and tooling) were used on adjacent corners of the same panel, and 1 nested (combined with border) and 1 did not nest at all (neither combined nor separate).  After looking into it, I realized the issue was that the engineer had one as CORNERNOTCH5 6 (valid) and one as CORNERNOTCH7 8 (not valid).  I found it odd that the 2 invalid ones still drew in 3D as if nothing was wrong, but then did not nest at all.  It would be better if either the invalid ones didn't draw at all (so that the engineer would assume there was an issue), or if an error message could pop up saying the token wasn't valid or something.  As is, this caused an issue on our production floor, because it wasn't caught up in engineering.