Source system balances loaded in ARCS from 2 data exchange locations

Summary:

For the month of Dec-25, we loaded the usual TB balances as Source System balance. Reconciliations were performed for Dec and closed. As part of P13 a few of these recons may see a change in balance and were expected to be reopened. To import P13 adjustments, a new DLR was set up and PTD adjustments data was loaded. As expected, the reconciliations having a change in balance reopened.
However, there were some lines in the second DLR which had a zero amount, therefore, having zero effect on the Dec-25 balances. Even then, these reconciliations opened up. Is this normal? Instead of 15 odd recons, we saw 600+ additional recons open up just because the adjustment data had a line with "0.00" amount and the recon balance effectively did not change.