How do I handle FP+ on my 11 year old's non expiring ticket?

[Juliet25]

I have 3 days left on a non-expiring 10 day MYW ticket I purchased for my DD11 when she was 5. I know Disney allows me to upgrade her ticket to an adult when we get on site at no charge, but that's not my concern. I'm wondering if I can enter her ticket information into MDE so that I can make FP+ reservations at our (fast approaching) 60 day mark? She's obviously registered as an 11 year old on our resort reservation, so will this present a problem if I enter in a child's ticket for her?

 

[kmb584]

It shouldn't as the system can tell it's a non-expiring. With that said, glitches do happen.