This looks kind of like the pre-Premier AB units by CCM as well. Since, thegoaliecrease.com use to mix and match the arms a bit more on their custom or "thegoaliecrease spec" units, perhaps something similar was done with the arms as well and these are either arms from a different (sized) unit or it has to also do with arms from the donor unit where longer to begin with. For example, I had no problem getting another R9000 slightly used for a backup, but likewise the arms of the XL one are too long for my liking, but the Large I bought new fits closer to perfect. The torso of both the XL and L on the stock units are the same, it's just longer arms in XL sized ones and the Large owners can also remove the belly extensions like with the R6000 model.
I am also curious whether you still work at Sportsmask after the acquisition.