[briffle]

Your missing the key part. You can order from the manufacturer through amazon, and they will ship you the part from the 3rd party (that may or may not be legitimate) if the have the same ID number. Even though you ordered from the manufacturer, you may get a fake product. They commingle inventory, to make it easier for them to ship from nearest warehouse, but don't really put enough work into ensuring the products are actually identical.

[snaky]

The funny thing is Chinese e-shops don't do that. You can find a bunch of the same goods at e.g. JD but if you buy from the JD itself ("Joy Collection" in the English JD frontend joybuy.com), it would never be fake and it would never be co-mingled - and the reviews are separated too.