Having watched this on MoTD now - I see you have summarised it perfectly!They somehow decided the bloke who might have fouled someone but didn't, didn't play the ball so the player who scored who was in an offside position if he did, wasn't. And the ball that seemed to have no line underneath any part of the ball didn't go out of play. Or might have done but they weren't sure. Or Andy Madley was watching the racing.
Simple, really.