Vicki -- just a thought. If it is crucial for you to be able to generate your superbills before signing off on the note, consider abandoning (for now) AC's superbill function.
At my clinic, I didn't use AC's invoice/superbill at all.
I had printed superbills, and each morning, we would load a stack of them into the printer and select...
File -> Print Schedule Info -> All Encounter Sheets for this Schedule
and the patient info would be automatically filled into the printed invoice. We would then print any work-ins superbill when they arrived.
Note that this is something Jon is planning to fix, but it will probably be many months from now.