In Mail Merge wizard after you select the file (the data source) then you go
into the file to select the records to merge (you can sort the data etc in
this step).  This box is taking the first row of data and using it as a
header row.  So instead of "First Name" being the first column it is
"Daniel".  When selecting the data source file there is a box that asks if
the file has a header row, this is checked.  Also tried to unselect the box.  
Also tried to remove the header row in the data source.  The only way I got
around it was to select the whole excel spreadsheet and paste it into a new
book.  I assumed the file was corrupt in some way.  This seemed to work for
me, but if there is an easier answer I would love to hear what you have to
say.  Thank you.