APINV First Responder Wins behaving like Consensus

Hello Everyone,

We are encountering a problem with the APINV WF process.  We have 1 Rule that routes Invoices to a static Group of approvers.  The Approval Group is defined as First Approve Wins regimen.  Once the Invoice Approval Process is initiated the APINV generates a notification to all Approvers within the group (good).  The problem is that for some reason the APINV process requires all people within the group to respond before moving past the group and onward to the next.

Has anyone else experienced this behavior before?  Our configuration and use of AME is extremely simple and this functionality works just fine with our REQAPPRV process.