Weird System Format will work in Original 3DS and Original 3DS XL without problems in 2.1.0-X (even one shouldn"t do one), as said it should be the cause of a bad downgrade and as also said you maybe won"t have anything to do that update it, that since it"s an Original 3DS XL it aren"t supossed to fail but you will end in 11.0.0-33.