Between CCFC and ticketmaster they have fixed the issue and I just order my tickets and printed at home.
Notes For others - make sure you assign the child to the child ticket. also if you have a 6 match package, select a U13 (or whichever) 6 match package for your child even though they are JSB members for a season. You still have to enter your credit card details even though value is zero. make sure on that page you select ticketfast otherwise you have to collect from ground. 3 mins after completing they email a pdf of the tickets to print.
First go seemed a bit messy but I'm sure it will be quick and simple for future matches and very pleased they sorted it.