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.)
I went, I enjoyed it, it was like a reserve or U20 match, you could hear SODs talking everyone through the match. Miller stood out, Moses scored two great goals and Stuparevic looked a good player.
I stuck with the card.
Have you had the instructions to generate your digital ticket, I assume it is a QR code?
For the League Cup games I am not sure if your season ticket record gets updated or you get an additional code. It would be good to share that information when you find out.