Hi Ron
The playing of the extra hole allowed for the reversal of the result of Hole 14 should this have been necessary - and it was! If the extra hole had not been played and Hole 14 was reversed, then the match would have been left in limbo. All this is only relevant because the players agreed that the issue would be resolved when the match was completed. Once Player A had declared the possible problem, then it could always be an issue in deciding the outcome of the match.
I'm also looking forward to the new forum! I'm beginning to find the finer points of the Rules fascinating.