I've tried to replicate the issue, but with no luck using a word table with headers. It could be that the word document with the table has got corrupt.

Why not try copying the table from the Word document and pasting into Excel. Then copying it back to a NEW document and trying the merge again. Or using the Excel Worksheet as the mailmerge data?

Another option is to upload both documents to see if it can be replicated.

Should your documents contain sensitive information make a copy and change that information (replace one letter with another say). The process is the important thing here not the information.



Good Luck.