Hey Clay, 

Hoping you can shed some light on my troubles, have tried calling QuickBooks for help with little success. We have a business AmEx account with multiple cards as well. I was given access to the books several years ago, at that time only the parent AmEx was connected. Transactions on all cards would still sync in QuickBooks. Several months ago transactions from the other cards quit syncing and only ones made on the 'parent' card would show up. Took us a while to catch and now our books are off for our AmEx. Curious if there's a way to fix this?