Ok I recognize a reading comprehension disability when I see it so I'll go slowly...
Read the transcripts and you will see...
O'NEILL: Alan, yes, they are, Alan. It's two different places, Alan. One place is along the Mekong River, right in the heart of the delta. The second place is on the west coast of Cambodia at a place called Ha Tien, where the boundary is right along that border.
Where Kerry was in Christmas of 1968 was on this river, the Mekong River. We got about 40 or 50 miles from the border. That's as close as we ran.
Later, Kerry went, and I went, to a place called Bernique's Creek — that was our nickname for it — at Ha Tien. That was a canal system that ran close to the border, but that wasn't at Christmas for Kerry. That was later for him.
So it's two separate places, Alan, and the story is correct.