Vendor owed $0.00 Show Up in Payable Ageing

[Jason Fox]

I've got a problem where a vendor, all of whose invoices have been paid, 
is showing up in the Payable Ageing report showing $0.00 balances.  I 
also have one employee with the same issue.  Where would I start looking 
to try and resolve the problem?  I do not feel there is an accounting 
issue.  Running Ubuntu 14.04 and gnucash 2.6.1.

Thanks for any help!

-- jason