Firstly, my apologies for being tardy for this, but I'm having computer problems. (It's probably my own fault for dropping it!

)
I am afraid I have to go with the consensus on this adjudication. Although
A Challenge clearly made a mistake when posting Exton and claiming victory in post #96793, the posting he made was invalid and must be discounted as such. This leaves
Buttsy to claim the points and start the new leg.
Sorry, A Challenge! It probably won't come as much consolation to you, but robbing oneself of victory by making a mistake such as this is something we've all done at some point; the flip-side of this is that we've all benefitted from the mistakes of others at some point too. Maybe next time you will be the beneficiary.
It may also be useful to point out that 24 minutes elapsed between the erroneous Exton posting being made by A Challenge and the mistake being noticed and opportunity seized by Buttsy. In this specific instance, #96793 (Exton) was an invalid post as the station had already been played. If A Challenge had noticed his mistake
before any further posts had been submitted, it would have been perfectly valid for him to strike-through that post and submit a new posting of Exmouth to claim the points. However, it should also be pointed out that
only posts which are not valid may be struck-through. If a valid post is made - even if it is in error - it may not be struck-through.
The floor is Buttsy's.