Looks good to me! If you hadn't said, I wouldn't have noticed the teeny tiny bit that doesn't quite line up. :wink:
I've switched to sandwich wrap paper for my paper piecing - it's thin & very easy to tear off. To make your pattern pieces, you staple one of your copies to a stack of the thin stuff, and "sew" on all the lines with no thread. Then you just need to write the numbers on them.
I don't tear off my paper completely until I have the borders on, but you can just tear off the 1/4" strip on the edge before you sew 2 sections together. That way you still have the lines to match up. Just do what makes sense & is easiest for you. :D