Workitems are logically deleted

[Uday Malghan]

HI Team,
 
We have custom workflow for approving trip related expenses. Workflow is
triggered whenever employee submits trip expense. I use Fork with two
branches. First one for normal processing and second branch listens to
Wait for Approval Event. I thought this will help me to complete workflow
if trip is approved outside of workflow . In the normal approval process
workflow is supposed to send e-mail  notification to employee about the
trip status.
 
But what is happening that when the manager approves the trip via normal
branch, Workflow is completed via 2nd branch instead of normal and all the
post approval steps are with status "logically deleted".  This happens on
most of the Workflow and not all.
 
Is their any way to distinguish the approval events created via workflow
approvals from the approval outside of workflow?
 
Any suggestions?
 
Thanks,
 
Uday Malghan