Event duplication issue XPI XML Adapter

Hello All,
I have XML Adapter from JD Edwards.I have configured it to poll XML files dropped in a given directory. JDE’s implementation should publish one Event(SalesOrderManageNotify) per XML file but occasionally it publishes 2 events per xml. This issue is very inconsistent.

poll intervel -10 sec (Also tried with 60 sec but no use)

Let me know if you need more info.Please advice.