Re: accidental octave
You have discovered a longstanding bug in NoteWorthy. I won't bore and confuse you with all the links to the discussion. The bottom line is that there are no plans to fix it. 
This is an architectural quirk of NWC. Note accidentals apply in all octaves within the bar. The way to avoid the problem at present is to always use the correct accidental in all other octaves of that same named note after you use an accidental in one octave of the named note.