Flying yesterday from STL-MSP our aircraft was delayed...first weather, then mech, then weather again. Eventually the flight was canceled so rather than stand in line for rebooking, I called premium sales line - they'd already rebooked me but in lousy seats so res moved me to exit row. I decided I should secure new boarding passes so ended up standing in line anyway since STL doesn't have the kiosks ATL does that just spits out the new bp. After waiting 45 min, finally met with GA to get new bp in exit row. He looks at me with a goofy look on his face and said, "oh, I wondered where that ghost booking came from" then said my exit row seats were no longer available, but offered cozy seats in the last row. I'm just a little surprised the GA wouldn't know that the so-called "ghost" booking was made by the person I spoke with in premium sales and that he shouldn't be overriding said ghost booking. Given my flight was 65 min and I'd been delayed 5 hours, I was happy to have seats at all. Lesson learned for me: in person rebooking gets better results.