Sorry, my bad. You're right - AC gift cards cannot be consolidated.

They can, however, be reloaded, so if one has $600 across two gift cards, and wants to apply that full amount to a $650 ticket (rather than using just one of the gift cards along with a secondary payment like a credit card), they can load $50 onto one of those cards to bring the combined value of those two gift cards up to the full amount of the ticket.

(my apologies as well also for being a bit off topic)