Why do duplicate Request State Metrics appear after RTC/RRDI upgrade?

I am being asked by a report writer why in recent weeks there are duplicate State values on their report.
The graph legend has these values ( listed in their order on the legend):

New
Resolved
In Progress
Reopened
Verified
Reopened
Verified
New
In Progress
Resolved
Verified


The "duplicate" states appear only on columns post our 4.0.3 > 4.0.5 upgrade on Feb 22, 2014.

The report is getting the State from this metric path:  Change Management / [Request Metrics].[State].[State].[State]
If I expand that section of the hieararchy, there are indeed multiple "New", "In Progress", etc.

Thanks in advance

More research ....
Using Query Studio to look at ODS / Request Area / Request State it is noted that there are entries dated Feb 23, 2014 which differ in the External Key2 field where the newer ones have something like: 

bugzillaWorkFlow
com.ibm.team.apt.storyWorkFlow
com.ibm.team.workitem.defectWorkflow



A bit messy but trying to show that "External ID", Name are the same, Request State ID are different and External Key2 is different.