The force accidental does not solve the problem in Gb or F#. That's why I posted the graphic with examples of the note B set to Force Accidental to Auto and to Flat.

The F# Key signature does nor work at all. It displays the key signature of Gb.

Shame really it doesn't seem to work. I've been using band-in-a-box for writing quick leads-sheets but I think your right the notation is not fully implemented so it's probably best I try exporting to a notation program from now on for lead-sheets.