My observation if it is helpful.
Drayton Park is on the line between Highbury and Islington and Finsbury Park. Dalton Kingsland is on the London Overground between Canonbury and Hackney Central. We came in via Dalston Junction, Canonbury, then Highbury & Islington. It seems
@A Challenge move at 23.25 might not be valid, since to reach Dalton Kingsland you would have to call again at Canonbury, since London Overground is all stations and Dalton Kingsland is between Canonbury and Hackney Central, not adjacent to Highbury and Islington from where the move was played. Drayton Park would be fine from Highbury and Islington it seems.
The potentially invalid posting seems to be the Dalton Kingsland one.
I would agree that we need an Adjudicator to determine the way forward here.