Bold Seagull
strong and stable with me, or...
I'd clicked the seats, then had a list of the seats and tried to change there, not sure if I'd move on or not really.
Right, I learned this the hard way. On that block seat layout page where you pick the seats, they are not yet in your basket!
Just click the seats, don't worry about age or allocation just get to the next page ASAP. Pick a car park, don't worry you can remove it later. Urgency required, just pick the seats, don't procrastinate, don't worry which is a better view, just click the bloody seats as quick as you can and click to get through to the next page - the next page is when they are into your basket.
Once into your actual basket page, the tickets are secured there for 20mins. You can then faff around with allocations, delete the car park space, you can even [continue shopping] and try to get more seats if you need them, those in your basket will be there for 20mins.
If any come up between now and the game, you have to do this, or someone else will nab them if you try to allocate ages or names on that seat selection page.