Need some frog experts help here... From what I have seen the SKU is almost always on the left ear stem of frogs, which is the ear stem with the Made in USA and or CE mark on it(of course lately the Made in USA is gone ) One of my pairs has the SKU on the right ear stem which is the one that has Frogskins on it. The SKU number does match up to exactly what the model is and the font and ordering of the SKU matches my other frogs. These are older and it does have Made in USA molded on the left ear stem which matches my other frogs. Factory mistake or are they fake? Any thoughts or help appreciated.