Apparently some of the saved itineraries under "My Itineraries" on Expedia.com are disappearing or being deleted without the customers prompting for such.

Worse yet, some of those itineraries are for tickets that have been partially used or were unused but still valuable/changeable. So now the resolution to this mess may involve reconciling credit card bills with what is reflected on Expedia.com. Not fun.

I recommend that those of you who use Expedia.com always print out your itineraries and not rely upon Expedia.com's "My Itineraries" as being 100% reliable.