On Snap with Grid priority?...

 From:  WillBellJr
No Michael, it was exactly as you GIF'd - a simple line that I was adding corner points to.

I think my prob was it wasn't aligned to the grid axis as you mentioned.

I ended up just zooming in real close to add the points...

I had noticed after posting, that at times it did snap to the grid in some cases - I thought I was seeing things though! :-P