Selecton Errors

[LHooker]

I'm trying to combine all records with a closed date and rejection_withdrawal date. If I run the each of
the below statements separately, I get 520 for for closed date and 382 for rejection_withdrawal date, but
with the below code, I can't get the sum of both (i.e. 902). Why ?

{Closing_Date} = {?Closed Date}
Or
{Rejection_Withdrawal_Date} = {?Closed Date}

[jggtz]

Maybe there are records that have {Closing_Date} = {Rejection_Withdrawal_Date}