When checking "My Itineraries" on .bomb, I noticed one of my trips was gone.
Even searching via locator number/ticket number did nothing.
I called reservations, and the agent told me that the itinerary was canceled, and told me to call the travel agent who ticketed my itinerary. When I told her I purchased the ticket from UA's site, she notified a supervisor who was able to recreate the original reservation. The agent had no idea how the itinerary disappeared.
Check your itineraries, everyone. Strange stuff happening...