This all seems completely intentional on Amazon's part. Why? Because it sends people to the amazon branded version of the item, one they sell directly, or a sub

This all seems completely intentional on Amazon's part. Why? Because it sends people to the amazon branded version of the item, one they sell directly, or a substitute. This is clearly an action they are taking to under cut their 3rd party sellers. Amazon can and is doing this. And it is working. Why would amazon want 3rd parties to sell something that sells well, when they can take the sale directly away from competitors? Co-mingling is just their excuse that covers up what they themselves are doing. A very convenient straw man for a problem that they don't want to solve in any other way that doesn't benefit only them in the end. This is a long play to have their cake and eat yours too.