Details from my call with Dakota:
They have a hiccup in their website when applying coupons they can only work on a “%” off. Single battery orders with the group discount code come up at the $71.28. Not much they can do about it through the website. If a person really wants the ~$2 difference, you’ll have to call them for a credit after the order they said.
For the chargers…as per first round, no price breaks on chargers. There is apparently very little margin on those.