you could use retayne or synthrapol to fix the dyes.
before i tried those though i would try to wash them normally in cold water. maybe all this hot water/colour catcher stuff is causing more problems than regular washing would.
i use batiks a lot. the only ones i've really had a hard time with were the gee's bend quilt kit fabrics. i got them on clearance at the lqs and decided right quick they were for wall hanging only.
good luck!
aileen