Well you have 2 big things in your favor. You have a Liberty and a call to them will bare fruit for sure. They will be very helpful troubleshooting and be able to tell you how the bus was originally set up and where that charging rate was originally.
You also have Jon who will undoubtedly chime in as soon as he sees you are having issues.
I think you are correct to wait and get more info before moving any further.
Be sure to post up the results.