the eCartCheckoutForm_state_province doesnt have a value set:
["eCartCheckoutForm_state_province"]=> string(0) ""
can you send a link please so i can see your checkout process in action, this will help me track down the heart of the matter.
I can see that you have applied the database shipping tutorial from the out of date eCommervce recipes.
the instructions that i gave here where to be used in place of the eCommerce recipes not in addition to.
The commerce recipes rely on a different database structure.
They where written around the premise that the state list would pass a state id.
The checkout pages from eCart have the state list pass an abbreviation instead. however, it doesnt look like your state list is passing anything...