Help on Array Formula which includes Index and Match

I have a product sales spreadsheet which is generated monthly. I also have a rebate report which is also generated monthly. I inserted an array formula into a new column (column E) in the sales spreadsheet which checks each row of data find a match of the customer name, catalog # and order number. If it find a match, it will insert the customer name into the row in Column E.

The formula in COL E in the products sales report is is as follows: INDEX('Rebate Report'!$A$4:$L$396,MATCH(1,('Rebate Report'!A:A=B2)*('Rebate Report'!B:B=C2)*('Rebate Report'!C:C=D2),0),1)

It does work and only puts a name into column E if there is a match. However for some reason it sometimes puts the wrong name into the cell in Column E and not the customer name from column B that matches. I do not know what in the formula is causing this. Thanks.

Product Sales Report 

The data looks like this:

Rebate Report