You will see below the two screenshots from the current US page.
There are two choices in the thumbnails above the Lead Time caption.
This is the screenshot with the caption.
It is a note to explain the AMS lite unit comes with the combo package only.
I suspect you mistook the caption that is above the choices for the product feature list and thumbnail choices.
I agree it is clearer on the iPad browser rather than my iPhone browser where I just took the screenshots.
I would be annoyed as well, and I am the first to call out Bambu Lab for there errors. I think in this case the you got confused with the bundle and combo and ordered something at an unbelievable value that wasn’t real because you misread it.
Assuming you haven’t opened it/used it, you could ask them to take it back and refund you, you will pay return shipping, but you can then order the correct one. It will clearly be a long wait time though.