is Matching rules taking into create date/time internally

Summary:

we have a scenario

We are matching Ledger to BANK

Ledger side we have 3 Sources- FS and DS, DS REV

FS should match to DS REV, BANK should match to Ledger-DS

we had match rules for Bank match to Ledger-DS , however we did not specify source as DS in the ledger side.

in normal days, DS Data created first, FS Data created after DS Data in ARCS, then Auto matching run, and it works fine for the rules of matching bank to Ledger-DS.

However, today FS Data came first at 4AM, Automatch ran before DS Data came in, after running automatch, BANK matched with Ledger-FS. which is incorrect matching.