this is a confusing bit in ffx-2
the crimson squad was set up by maester kinoc in ffx during the same time as operation mi hen so y yuna and co was watching the cruseders vs sin the crimson squad went in the den of wo and got taken over
thats all i know anyone know something different enlighten me

Er... did you get all the Crimson Spheres and fight through the Den of Woe? If not, I think it's better for you to watch then anyone trying to explain it. Still, I guess we can try though if you insist.