Follow this link and you will be good to go...step by step instructions on how to switch it to MPH. Also, I'm guessing that 11000 KM is going to roughly work out to 6900 miles. Mine did the same thing when I got it back from the shop after installing a new ECU. I about came unglued when I looked down and saw my odometer, I thought they had taken it on a 2000 mile joy ride! All was well one I made the switch to miles.
http://www.ducati.org/forums/how-tos/60206-how-hidden-service-menu-848-1x98-part-1-a.html
http://www.ducati.org/forums/how-tos/60206-how-hidden-service-menu-848-1x98-part-1-a.html