PO workflow notification

Hi. We are having problems with workflow notifications when a PO is denied. We have configured transactions setup at both line and header on final denial to send emails to the buyer if the PO is denied.  When we have PO's that have multiple lines or multiple distribution lines we only get the PO denied email if the first action against this PO is Denied.  For example, we have a PO with 2 lines.  Line 1 gets approved and at some point later, Line 2 gets denied.  We do not get the denial email. However,if Line 2 got denied first, then we get