Transaction is being edited by another user AND Item Quantities aren't completely fulfilled

I have two invoices that are in 2 separate SOP batches.  When attempting to select these transactions I receive the error 'This transaction is being edited by another user'.  When I look at the batch edit list the transactions have line errors 'Item Quantities aren't completely fulfilled'.  I looked in the SY00800 and SY00801.  Found one of the transactions in question but not the other.  Not sure article ID 866440 is the fix for this. http://support.microsoft.com/kb/866440

Any guidance would be appreciated.

Thanks!

Alicia