I have the following formula entered in cells B2:B163

=INDEX(Schedule!$B$1:$B$1300,SMALL(IF(Schedule!$A$ 1:$A$1300=$A$1,ROW(Schedule!$A$1:$A$1300)),1))

I formulas in cells C2:C163 and for some reason they are not working. They
are coming up as #REF!. If I overwrite the formula in cell B2 and input the
value instead it works fine. Any idea why? I have been cutting and pasting
values so that might have screwed something up. Any ideas? Thanks