Two Level release done by single approver for PR release strategy.

Hi Experts,

We have a strange case for PR release Strategy, We have 4 level release Z1, Z2,Z3 and Z4, and we have 4 approver's for PR release strategy. A1, A2, A3 and A4.

Here after approval done by A1 its went to A2, A2 has completed his task and for level Z3 again work flow triggered to A2 and he approved Z3 level also. But in Authorization we have given Level2 authorization to A2 and Level 3 authorization to A3.  We don't know why it is went to A2 again for level 3 Approval,

Kindly suggest what is the wrong in release strategy.

Thanks In Advance,

BR,

Basu