DESC center diff assembly

[RC John]

Can someone explain to me why the silver washer is placed after the E-clip on one side of the center diff? On all other diffs, the washer goes on before the e-clip. Is this a typo? The washer in question is the one with the big arrow in pic.
Also, my truck has the upgraded the center diff, and if you follow the assembly as shown there, the washer puts so much pressure on the bevel gears that the washer actually gets warpped. When I disassembled it, I found the washer is no longer flat, but coned.