Those aren't award citations. All three of his Purple Heart award citations are at: http://www.johnkerry.com/pdf/jkmilservice/militaryrecords_1.pdf
on pages 2, 4, and 6.
What you are looking at is a document he got before the citations which appear to have the correct dates. He had to request the actual citations later. It's the citations that are incorrect. Perhaps not his fault, but it is a personal responsiblity to have your records corrected.
Thanks for clarifying... and great observation on your part!
I have looked at these quite a few times and missed the 'out of sequence' issuance.
Yet another thing that makes no sense in Kerry's records!