F# Major: E# is automatically notated as F-natural

I was notating an F-Major scale with the keyboard, and when I hit the "E" key, it automatically notated the enharmonic F-natural. This is bad form, as it is no longer the seventh of the scale, but rather an altered root. My key signature had the correct number of sharps to notate an F-Major scale, so ideally the program should have read "F-G-A-B-C-D-E-F". However, it read: "F-G-A-B-C-D-FNAT-F"

I attached a picture.