I have a pattern that starts with 21 stitches between the markers. The instruction is to YO, K9, M1R place marker, K1 *M1L, K9 YO. Every time I do this I am coming up with extra stitches on the second half * there are 11 stitches. Is that because you do not count the stitch following where you do the M1? I am confused please help.