Closed PP Documents still appear on the Vendor Period Trial Balance

Hello,

How do you get rid of PP documents that continue to show on the Vendor Period Trial Balance? I've verified the APDoc table and found that the following fields have are all been properly updated but the document still shows.

OpenDoc=0, PerClosed=201505, DocBal=0, CuryDocBal=0, Selected=0

I also checked the APAdjust table AdjAmt field for the document and it shows 0.

This is happening in SL2011 FP2.

Thanks,

Dan.