Some Bills not registering as paid

[Russell P. Sutherland]

I find that when I enter a Bill/Invoice for a Vendor
and then pay the Bill from an assest account 
bank/chequing account) the bill appears still as unpaid 
(i.e. it appears upon Gnucash startup as a reminder) and
when I go to the vendor and look up the bills s they all
appear as unpaid eventhough the general ledger shows
amounts in the moved from assests to accounts payable
and from payable to the expense account.

Is there some flag  that is incorrectly set for this vendor
account? I only see this behaviour on some on my vendor accounts.

What could  I be doing incorrectly?

-- 
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