Just recently I flew from Phoenix to San Jose, then from Sacramento to Phoenix. Trip #1 had two checked luggage pieces,both same in size & weighed under 50 Lbs. On my return flight I still had two checkin pieces except one was changed to a smaller size. The contents however did not change, just shifted. Obviously the smaller one had less room. in order to not leave anything behind, i used space saver bags and shifted some of the contents from one to the other. None the less the weight of both pieces came out to be actually less because of the smaller size. Heres my question: If the limitations are not to exceed 50 lbs per luggage piece & a person is allowed 2 pieces of luggage & the two pieces of luggage combined still does not exceed SWA's 100 pound limit per piece, then why was I charged for the overage. The same thing happened to my cousins attending the same wedding. Does anyone have a reasonable explanation other than "Thats just how it is" or "If they dont people will take advantage of the system" I am one person that is allowed up to 100 lbs of checked luggage. If i only have one to check in then so be it; but if i have two and one is over 50 and the other isnt then shouldnt i be awarded the difference in weight instead of being charged? Does it have to do with space on board, the ramp agents packing it in the plane. Because if thats the case, what happens when a piece is over sized and over weight and they've allowed it to be checked after paying. Still doesnt make sense to me. Anyone?