Your .dar version shows that your WFA is 2.1. Is this correct?
This is a known issue with WFA2.1 that a false failure notification in SNMP and email gets sent when workflow is having a command of type "Wait for Condition". Your workflow has a command "Wait for VSM" of such type and this is the one causing the false notification.
This bug has been fixed in WFA2.2 GA.So please upgrade.
If this post resolved your issue, help others by selecting ACCEPT AS SOLUTION or adding a KUDO.