Hey C Mast,
I'm positive that I understand your question. instead of that Count, why don't you try to using Sum(If()) or Count(If()) as below, it will give you an idea.
=Count(If(([Sale Status]="CMP") And [Sale Status Date] Between([dateReportStartLastYear];ToDate([dateUserInput];"MM/dd/yyyy")))) Then [Sale ID])
or
=Sum(If(([Sale Status]="CMP") and [Sale ID] = [Sales ID] And [Sale Status Date] Between([dateReportStartLastYear];ToDate([dateUserInput];"MM/dd/yyyy")))) Then 1)
I'm 100% confident that those formulas have extra/are missing parethesis, please fix it. I was just trying to give you an idea.
Let me know if that helps.
Thanks,
Mahboob Mohammed