New porous tiles ruined by grouting? PLEASE HELP!!!!?

brand new bathroom and tiled it with a rough textured porcelain tile that has a surface almost like a low grit sandpaper. i thought it would be great for non slip in a bathroom. i put the grout all over the joints and almost immediately started to sponge off...probably 5-10 minutes later. all the edges of where the grout was it left a terrible stain like appearance like the grout(white) saturated the porous tile. the brown tiles now look like they are marbled with salt stains!! i was thinking of just tearing them out and getting a glazed tile....but is there any way to fix this??? damn!