Please, for the love of the Twelve, can someone explain to me how the stupid timers work? They make no sense to me. I was working on gathering the items I needed for my Grand Company Supply and Provisioning missions after having crafted all the items I needed, when the list just CHANGED in the middle of the afternoon.

The timer says 12:33 Remaining (5/23 5:00). Why in the 7 Hells did the list change in the middle of the freaking afternoon? I wasted time, money, and materials, and now have to craft/gather an entirely different set of items!

This is stupid, and needs to be clarified.