Try posting a single image instead of a slide show. The Img tag should display it in your post. The URL tag will just embed a link to the Photobucket page.
I'm not surprised that the dates match. Remember that September 1980 was the very beginning of production, so there wouldn't have been a big stockpile of bodies and necks like later on. The same thing happened when other new models were introduced. I don't have any with matching body and neck dates, but a few of mine have dates within a week.
The body on my F-100 (serial number G000504) is dated the day after yours. I don't have a clear shot of the stamp, but here's the guitar:
Ken