PO Blanket to be approved automatically

Hi

We have done setup in Purchasing  Navigate to Setup > Tolerances and Routings > Change Order as per Doc ID 1114515.1 for Header amount maximum increment is set to 10%

Increased Existing Blanket PO header amount to value less than 10%, But still PO is going for re- approval. As per setup of tolerance blanket PO it should get approved with out any re-approval.

Would like to know if there is any other setup required to blanket PO header amount changes should get approved as per Tolerances

Thanks

Kamalakar.G