I have an =IF(AND( .... formula. One of the conditions in the AND portion is
to compare a date in one cell(call it sht-1 A1) with the dates in 2 other
cells (call them sht-2, A1 and A2, one being a start date and the other a
finish date). I am trying to return a "FALSE " if the sht-1 date falls
outside (either before or after) of the dates in sht-2 cells.

The formula as written is:
=IF(AND($B90,$D90,$E9="yes",N$8='Proposal Data'!$C$7,'Proposal
Data'!$C$11=N$8)...............................

The portion that isn't working is the 4th argument where N8 is compared to
the other dates in C7 and C11. It is returning a "TRUE" when no dates are
present in C7 & C11 and allowing the remaining calculations to ocurr. There
is more to the formula but it is just additional IF statements. Can someone
tell me what i am doing wrong? By the way, when dates are present in C7 &
C11 the formula works perfectly.