This "bug" is pretty obscure - it requires two user mistakes to be made before it happens. :-[
So it might not actually warrant a bug fix.
I copied coordinates from an email that someone sent me and then created a new waypoint using the 'Clipboard' option to paste the coordinates for the waypoint. The email had the coordinates formatted as N41.48.392, W88.19.396. (I use DDM format.) I did not notice the additional decimal after degrees when copying, and did not notice it after pasting, either. After tapping OK, Locus did not give me an error message about invalid formatting, it just entered something very different. Try it - it's easily repeatable.
Hi, I believe this may cause trouble.
Well, two decimal dots in coordinate format is not usuall :).