What is the trigger for the custom auto reconciliations?

We are using version 11.1.2.4.100.

We have custom rules in the format that 1. auto submits the reconciliation if the unexplained balance is zero and 2. auto approves the reconcilations if the unexplained balance is zero.  The steps below are the only ones that seem to be successful.  The fact that we must delete reconciliations and copy them back leads me to believe that we have a step that is out of order.  Can someone please explain the trigger that executes these rules?

1. copy profiles to period

2. load premapped transactions

3. Load balances

4. open period

5. DELETE RECONCILIATIONS

6 copy reconciliations back to period