HOw many stitches are you using per repeat of the (bind off 3, k2). I bet you use 5, which was what I would have used, but to make this work you need to use six per repeat.
I would have written the first row as:
k1 (k1, bind off three, k2) repeat until last stitch, k1
98 (original cast on ) - 2 (beginning and ending stitch) = 96
96 divided by 6 stitches per repeat = 16
16 x ...



