I'm not sure what you mean - do you have a picture? The back of a knit stitch is a purl, the back of the purl is a knit so on the next row, the sts that you worked the previous row will be 'reversed'. It may be that you wrap your sts 'backwards' so the leading leg is in back of the needle instead of in front. Just knit into the first leg, the one closest to the needle and your stitches will be even and untwisted.
sue- knitting heretic