Originally Posted by
UALboy
My conclusion is that I was supposed to have 32kg on my checked bag.
Based on what? Your allowance should have been based upon the rules for the marketing carrier of the first flight in the itinerary -- UA. You should have had UA's US to Europe allowance -- zero or one bags, depending upon fare, at 23kg.
ETA: plus one bag for *G -- so 2x23kg, assuming no BE.*
*UA isn't selling BE on W fares for US origin points, so it seems like a safe assumption in this case.