Hopefully the ‘losers’ don’t walk away and are available for working groups or co-opted positions with a view to being useful candidates for next time.
I have tried the same, it allowed me to select a child ticket but when proceeding to checkout it advises
You must purchase a 13 & Under ticket with an Adult or Over 65 ticket.
It’s just a poorly specified interface, that can’t possibly be the intention. Is the site still operated by TicketMaster? Motherwell need to update their requirements and get TM to make the change.
So you could have bought an additional adult alongside a child but not an individual child ticket, is that the issue?
If you were using your season ticket account then that is a nonsense. (And presumably easily rectified.)