Before we go flying off the deep end here, it looks to me like that particular line about wounds received as a result of enemy action on line 27 applies only to his time in training at Newport. It is part of the Service Data section for this portion of his enlistment and is followed by VA Data and Authentication. This portion of the form would have been filled out when he was discharged from OCS and sent to active duty with the Navy.
The Service Data section that covers his time in Vietnam (did you know he served in Vietnam?!?) is on the following page. This form does not have a similar line regarding wounds received, but does include his three Purple Hearts.
This may not be a smoking gun here. Sorry to rain on the parade.
P.S. I am not a troll.
I have seen a little discrepancy in terminology in your post and a couple of others though.
You post and others have referred to "the second page." To be more technically correct, it's "the second DD-214."
Kerry went into the Navy as an enlistee, went through his basic training and officer training, then was discharged as an elisted man; DD-214 #1.
He was then commissioned as an officer and a second DD-214 was issued when he was discharged.