I had it down to a science, I knew the direct number to their fraud dept and I knew when I should place my call so that I'd usually be connected at just the right time to get the charge authorized with enough time to avoid the website session from timing out, although sometimes I'd have to start over. Eventually, air canada added a timeout popup which helped prevent this.

I tried everything to get BoA to fix this (escalating calls, writing letters, etc). By the end, I gave up and just accepted it when they "put a note" on my account so this "would never happen again". This went on for over 2 years. Thankfully my company switched our cards to another bank and I never had this problem again.