Transaction Matching - Load/Match Data Daily

Hello!

We're implementing Transaction Matching and we have a use case to load transactions on a daily basis and run matching each day.  Our TXM scenario has 12 periods, but we're finding that once the data in the Import step loads to the data set and the transactions match, additional files cannot be loaded using the same import step since there are now transactions from the first data set that have been matched.

Example: 

Import transactions on May 1 into 2022M5, run matching - transactions are matched.
Import transactions on May 2 into 2022M5 - error - all transactions in stage have to be unmatched first before reloading.

Wondering how others handle this - create a separate import step for each day of the month to load each individual daily file and combine them all to load into one data set?  Are there other options?

Thanks!

Kathryn