UPDATE: Posted the review you see above on Meyer's website and received a call from them less than an hour after hitting send. The woman was friendly and apologetic that my order was handled. We worked out an alternate shipping date, and she added a vit-a-pack (vitamin supplement to put in their water once a week) to my order. She apologized again and told me she'd keep in touch until my order shipped.
Then after she got off the phone, she noticed that I was also charged the wrong amount and called me right back to let me know that she'd be crediting my account the difference.
My confidence has been renewed in human kind. Let's hope all goes well :)