darkj,
I understand how much work this is for you and was not challenging the list, just providing information.
Pretty sure Merrill meets the "Assembled in USA" criterion but not "Made in USA." That doesn't make them anything less than a well-regarded company who manufacturers well-regarded products, just not "Made in USA."
I believe the other company you are speaking of may be a speaker manufacturer that either misunderstood, or disregarded, the requirements for labeling goods as "Made in USA," depending on one's viewpoint. They have taken a lot of heat for the mis-labeling, particularly on one website from one outspoken east coast AV dealer and, from what I have read, they have owned up to the "misunderstanding." That company, and its owner, have a long-standing reputation for excellent products and outstanding customer service and they have never been known for anything but great-sounding, high-quality products, particularly for the cost.
That may beg the question, what is the point of looking at this. I am more interested in who manufacturers excellent products, stands behind those products, and offers its customers excellent communication and responsive service. However, I am also interested in who manufactures and assembles products in USA, particularly considering the state of our economy and the loss of manufacturing in USA, and I appreciate your efforts.
You have received some recommendations of excellent "Made in USA" companies from the folks here, like my Clayton Audio and SMc Audio recommendations, and you will likely continue to receive recommendations and feedback. I am sure it will take some work to get everything sorted out and wish you luck in that endeavor.