So you ordered it thinking that they had made a mistake, and might follow it up with another. That you were quite happy to profit from.
When they did send you the lens you were expecting to get and you got what you were expecting, if not what you were hoping for, you sent them a less than straight forward e-mail asking for an explanation. When you were pretty sure you knew exactly what had happened, and it was what you were expecting anyway.
Then to top it all they didn't promptly reply to your smart e-mail!
So to reply to your thread subject line.
"Should I be annoyed with Adorama" Well I would say only if you really think they have fallen from a high standard you might reasonable expect.
"or is it my own dumb fault?" Well I would say only if you think its unreasonable to try to take advantage of what you think is a mistake. But hey you are proving a point. I'll let you figure out what point it is you are proving, as I see it.