register new supplier consider different operating unit

Hello,

I trying to register new supplier with below process

1) Select OU "A" and on next page enter address, contact info then click register

2) Approve the request by approver

3) Once the supplier is approved, the site address created for OU "B" than OU "A".

Site level MO: Operating unit is B and responsibility level its A.

profile option value for POS: SM: Site Enable Option On New Supplier Request Approval - Enable Supplier sites for the new supplier request OU only at responsibility level.

Why system creates sites for the different OU.

regards

madhu