Requisition - Requisition Actual # of Days ____ Incorrect Data?

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I am writing a custom time to fill report.  I included columns with the fields Requisition - Requisition Actual # Days xxxxx (with xxxx = Open, Closed, On Hold, Filled, etc.).  I then ran the report and it came up mostly zero in every field for every requisition.  I put the Req ID in the report so I could look at some specific examples. 

Requisitions that I can see have been "Open" for weeks have a zero result in the Requisition Actual # Days Open column in the report.  Based on this, I am assuming I must have a setting incorrect that is not triggering that counter.  Any ideas????