Thanks. Yeah, it appears that it's only Staff of Magus that won't target past 15m while all other spells do. I'm pretty sure in beta my staff could go to 17m.
Edit: Also Far Out Man only extends to 16.9m and not 17
I had a similar issue in beta that I'd get 14.9m / 16.9m. They said it was rounding the displayed range, but going off actual range, e.g., 17.1 rounded to 17.0.
Just now I checked and I can get 17.0 but I have to move the mouse veeeeeeeeeery carefully.