thats why I posted this:yes, but that is why it's so confusing.
the dupe has the same number as the original, so if you look at the trade history,
the trades from the dupe(s) and from the original show up both in the same list.
so it looks like 1 hat that is being traded a lot.
Here are the 2 merryweathers, pretty much identical:
http://tf2b.com/item/76561198020615858/281196270
http://www.tf2b.com/item/76561198019401473/730773144