Several observations about the 2010 Cornerstone:
The chassis was probably meant for a Travel Supreme and became an Entegra after the transition. Two clues--no DEF and total height. To find out for sure, call Spartan with the VIN. They will know. I don't see this as a problem--just an observation.
The" ALL" light switch will only turn the back light off and on. It will not turn lights off and on.
The slide seal replacement is not a big deal. You will probably want to replace the whole seal.
Your dishwasher is made by Fisher/Paykel. See a video at:
You can also look up the operators manual on the web.
My wife loves ours. We frequently use it while driving. All the hot water we want.
I am sure you will be happy with your new coach. What floor plan do you have?