it sounds like you have a parity case where an odd number of cross edges are flipped

the solution is: Rw U2 x Rw U2 Rw U2'Rw' U2 Lw U2 3Rw' U2' Rw U2 Rw' U2' Rw'

if you also have an unrecognizable PLL do: Rw2 R2 U2 Rw2 R2 Uw2 Rw2 R2 Uw2 U2

the solution is: Rw U2 x Rw U2 Rw U2'Rw' U2 Lw U2 3Rw' U2' Rw U2 Rw' U2' Rw'

if you also have an unrecognizable PLL do: Rw2 R2 U2 Rw2 R2 Uw2 Rw2 R2 Uw2 U2