That's weird. I planned the same route, or pretty much (from your screenshot) and the bulletins in my Weather tab go as follows:
Gatwick
Odiham
Biggin Hill
London City
Benson
Farnborough
Heathrow
Northolt
Stansted
Luton
Cambridge
Cranfield
Which I think conforms roughly with a sort-by-distance algorithm. What we need to do here is understand why yours are not appearing in that order. Could you contact customer support about this? They will be very interested in the exact route you're using and (more importantly) your SkyDemon settings. Thanks!