Tickets for the friendlies, buying online question

I feel silly having to ask this, but it's been a long day, and I'm tired of thinking for myself.

I want to buy tickets for the two home friendlies, I'm using the eticketing site.
I want three tickets for each game; one for me, one for my brother, and one for my nephew.

I'm fine with the tickets for me and my brother, we're both season ticket holders, so we get £10 tickets.

But when I add the ticket for my nephew, who isn't a season ticket holder, it puts in the £5 ticket.
Does he get the discounted ticket because I'm a season ticket holder, or do I need to get him an £8 ticket? If he needs an £8 ticket, how do I choose that? There's nowhere to change it?

 

The rules seem to be different for friendlies; as a ST holder I was able to buy several tickets at the reduced price of £10/£5 for the Chievo game.