That has a different affect anyway :)
=IF(OR(LEFT(B8,3)="ART",B8=""),0,INDEX(Data!$A$8:$A$1000,MATCH(0,COUNTIF($AI$14:AI14,Data!$A$8:$A$1000),0)))
This time I have a 0 in the first row, 3 unique results only one of which has an ID in the B column, no more of the 12 or so unique results and a...