Matching and allocatng payments

We use Square for EFTPOS transactions and the payment from Square adds all the transactions for a given day together into one payment that shows up in my bank feed . 

Some of the transactions in that payment need to be Allocated and some need to be Matched to an invoice (eg a deposit).  It seemed logical to me that I could go into the payment in the bank feed, allocate what needed to be allocated, save it, and it would put the rest of the payment back into the list for me to match.  Instead I get a messages saying I cannot save a portion of the transaction, eg it all needs to allocated or all needs to be matched.  

Is there a way to do this?  Thanks in advance.