Just guessing, but maybe they want to use Rainbow-1 in all spotbeam mode in the future, so they're duplicating all the CONUS channels on one of the CONUS birds. Then when everyone has a Dish 1000.4, they'll take them off 61.5.
I'm not sure what you mean. Rainbow 1 spots are quickly filling. Only one TP (17) is left to be reused in spot mode. I don't think using all the spots on Rainbow 1 maxes out the power. In think it can still can power all the other CONUS TPs it offers. Plus, most are on 72.7 already.
On close inspection, the numbers look like Dish Latino numbers. Maybe latino will be EA as well.