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It is not dishonest. The photographer got the frame, more than likely heard the white hat make the announcement that the ruling on the field stands, and it is a touchdown. Not knowing who the photographer is, although, I have a pretty good idea who it was, I shooting "live" he got the shot, heard touchdown, and ran to get it out. Once he got to his computer, he most likely had to go through 500 to 1000 shots to pull 10-15 shots, caption them and transmit. He was probably unaware of all the craziness until he had transmitted, and most likely every photographer who was not rushing the field was rushing to the media room. And with the AP and Monday Night Football, there very well could have been a runner and an editor, meaning the photographer did not caption the photo at all, but an editor did. I have known AP photogs that have had captions rewritten, or not written by them at all and written incorrectly.
However, while one official is signaling touchdown, and one is not, the call on the field, and upheld by the NFL is touchdown, so the caption fits IMO.