getInstanceList service in WMMonitor package

I have a query with respect to the behaviour of the built-in pub.monitor.process.instance:getInstanceList service in the WmMonitor package.

When I set the dateCreated input of this service to Today to retrieve the processes created on a particular day, even though I have run just one process it gives me an instance document list of around 10 process details all with the same values.

The 10 instances returned as a result have the same values.

Request any of you to please let me know why is this service returning 10 values instead of just 1 process details.