So I attempted my very first mitten last night and it looks great except for the thumb. Right at the base of the thumb I have a couple holes. The directions tell me to place the thumb stitches onto a stitch holder, which I did, and then I'm supposed to continue working in stockinette stitch adding 2 stitches under the thumb once. Huh? How do I do that? Will this solve my hole problem? Please help!