More Sweater issues

[mintdee]

Okay so I got my yarn yesterday and this morning decided to knit this sweater for my hubby.All ready it is driving me nutso. Here is the part that is driving me mad:
cast on
77 stitches.
Begin working back and forth.
Row 1: work one wrong side row even.
Row 2: Set up “seams” as follows:
Increase into first stitch by knitting into the front and back of that stitch. M1, place marker 1, k3, M1, knit 13, M1, place marker 2, k3, M1, k33, M1, place marker 3, k3, M1, 13, M1, place
marker 4, k3, M1. Increase into last stitch. As you increase along the raglan sleeve seam lines, you will keep a three stitch wide column of stocking stitch between your pairs of increases. Center your stitch pattern repeats within each section (sleeves, back, front) and incorporate increases into the established pattern. 87, stitches.

Heres my question:
I knitted the first row and (counted over and over) got to the last few stitches on the second row. I run out of stitches before I can finish the second row. I did it twice and got the same results Any suggestions as to what I am doing wrong?
TIA!