I heard back from AMT this morning at 5:43 am MT I received the e-mail confirming receipt of my payment.

I could create a picture of it but I'm too damn tired, you can believe it or not that is your choice. Here is the content of that e-mail:

Hi Curt,

first of all I would like to apologize on behalf of the entire AMT Team that we haven't replied to you yet.
My name is Alyssa and I am dealing with the payments and the accounting, but we are so extremely swamped and short staffed at the moment, that I will try and help out by catching up on the tons of emails in the sales inbox as well - as much as I can of course.
Your check has been received as you have been previously told. I am sending you confirmation for your payment - you can find it attached.
Regarding the status that the website is showing you - I will tell the IT guys to change it, but even if this doesn't happen in a timely fashion, disregard it because I have already added you to the list of orders and this is what counts the most.
I have amended you email address as well, so we don't run in any confusions in the future.

Also I would like to thank you for your patience, I can assure you that the entire AMT team has been mobilized in the manufacturing facilities, solving issues, running tests and trying everything we can to get the machines out the door.

All the best,
Alyssa Trusten

Attached was a confirmation of payment in the form of a fully paid invoice.

They were even nice enough to correct a mistake I had made while inputting my e-mail.

Who ever is in charge there needs to let this Alyssa take front of house operations, and posting in this thread, this is the most professional response I've seen from the company. Even if it took two days to receive, which wouldn't be bad if I hadn't made prior attempts with no response. 

I'm interested to see if anyone else receives any e-mails today If you do I'd at least post that you received one. It's not really fair to give them all the shit but not comment on something they might be doing right. The fact that someone is up and working at 7:45 am on a Sunday gives me some encouragement.