Some thoughts:
- on the ground, getting clearance more often than not your destination is read as a word 'seville' or 4 letter icao code. Never the IATA code.
- the keyboard on the FMC isn't going to be QWERTY, so C and V aren't next to each other
- ATC would be clearing you to the exit point (or some point on the way there) based on the FPL they have in the system. You couldn't go completely the wrong way 'by mistake'
etc.
I reckon whoever mentioned the wet leasing 'plan' being sent over and mistyped is pretty much on the money!
NW3