Red is always your enemy! I refuse to let red clothing come in the house any longer. Just not worth it. Just keep washing with the color catchers and synthrapol. DO NOT DRY it until you get all the dye out. I had this issue with a green fabric several years ago. It was pre-washed and still ran...and ran and ran and ran. I finally gifted the quilt with a box of color catchers and told them to never wash it without them!