Just an update from those I know who purchased tickets in the time frame on and after June 5 2017. They now see the ticket purchases under Transactions on their credit card activity (online). It shows the purchase date of the ticket, but will also show a more recent posted date, based on how your info appears for your cc.
Depending on your statement date, they may already be there.
As far as we know, as long as you have your ticket and AC ticket number, and you have confirmation either from screen shots during purchase or from Manage Bookings showing it was billed to your card, you should be fine.