Process Bank Transactions - Matching Transactions from a Bank Feed

We have a client that issues approx 6000 checks per month for lease payments.   Most of these checks are for the same dollar amounts (ie. 3000 checks for $ 1000 and 3000 checks for $ 1500).  When the Bank Feed comes in the Bank Feed writes the Check Number to the Tran. Desc field.  Acumatica seems to ignore the Tran. Desc field and suggests matches displaying 3000 checks all for $ 1000.  Acumatica Tech Support told me that it only matches based on Amount and Transaction Date which doesn’t make sense to me since Ref. Nbr. Weight as well as Doc. Payee Weight are part of the Relevance Calculation.  What fields does Acumatica read to match  Ref. Nbr. Weight & Payee Weight ?