Agreed with above poster ^
Black shanks get -1 per white toe.
If your black ameraucanas had blue shanks then they wouldnt get any deduction.
To answer your questions no, Just about every black bantam or LF Ive seen at shows have black in their beaks. I'd be more concerned with her body type. I'd also cross her with a male with very good red eye color, and continue to breed for redder eyes. Dark eyes I believe are also a deduction, someone else might chime in.