We merged a list of names and lot numbers to go at the end of a a master MSWord 2010 document and when the merged documents were created, certain paragraphs designated (a), (b), etc. were incrementally increased in each new document. In the first new document, (a) was changed to (o), (b) was changed to (p), etc. As each new merged document was created, the paragraphs were changed so that he last paragraph is (wwwwwwww).

What is going on?