I think I have it figured out! I was confused because no matter what I did I had stitches left over.... but... I think I've solved it!

Next Row: K45 * sl 1, k1, psso, k2; repeat from * 10 more times, **k2tog rep from ** 10 more times, K45-156 sts rem. should read:

Next Row: K45 * sl 1, k1, psso, k2; repeat from * 10 more times, **k2tog,

k2; rep from ** 10 more times, K45-156 sts rem.

took me awhile, but I finally figured out that the patter wouldn't be even if 1 set of decreases had 2 stitches in between and the other set didn't... no more left over stitches!