Yes, that would supply the cleanest audit trail.  You could just void those affected, but that would probably be more time-consuming and would definitely leave you open to human error when selecting which to void. 

Void the checks, but retain the entries. Then you won't have to re-enter time, just reprocess/print/post.  To avoid this in the future, I suggest using check as the Calc frequency and controlling it via a formula if it doesn't apply to every check produced.  But union data is usually by check, not week.

John McLagan
Johnny on the Spot
Sage Consultant