Coupling Buick Pontiac

We live in the U.S. My Mom bought a new leftover 2007 GMC Canyon a couple weeks ago. We've noticed a couple of discrepencies that we can't make sense of. First, the new car window sticker labels it as a "W/T" trim, which I assume to mean "work truck" because it is very basic. However, on the tailgate of the truck it says "Canyon SL". Anyone have an explanation for this? Now for the second discrepency. Remember we live in the US. The speedo shows MPH as the larger outter numbers and Km/h as the smaller inner numbers, just like on all US sold vehicles. However, when we start the truck, the digital odometer says "Km", then displays the odo reading after a second or two. We looked in the manual to see if you can toggle the odo between miles and Km, but that doesn't sound to be the case. What is going on with these discrepencies? She bought the truck brand new from a Buick/Pontiac/GMC dealership.