I think all editions ran that bizarre error, Rob. I don't have any printed version of the strip to scan but, after checking my rough script, I can tell you what happened in it....
Frame One: Outside the fort, Sergeant Bidet is talking to the unshaven Beau and Dennis.
Bidet: "Once again, you two are the last to complete the survival exercise."
Frame Two:
Bidet: "You've taken incompetency to a new level"
Dennis: (punching the air, happily) "YAY!"
Frame Three:
Beau: "That's not a good thing, Dennis."
Dennis: "I wasn't sure but I like saying "Yay" "
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It's at times like this, as the tumbleweed drifts by, you realise that the artwork is 90% of the strip.....