I am looking at the preview of my mail merge and can see that in the middle
of the set of hundreds of labels one field of data randomly changes to a 0.  
It does not match the data in the data source and it does not occur until the
19h label.  No formatting is different on this label than the ones prior.  
When I highlight the zero to right click, it has it listed as Next Record and
not Merge Field.  If I manually make the zero the correct merge field, then
it updates it with the wrong information.  If I edit the list of recipients,
that field starts showing a 0 at the 19th row.  It doesn't show that on the
real data source in Excel!