Problem with a pattern

[electricgal]

Hello,
I am new to knitting, I have crochetted for about 30 years. My first project of course has to be something that is ittermediate, my son asked for this afghan. Anyway I feel after tearing this first row apart about 20times that the pattern might be wrong as to the casting amount. It requires you to cast 149 stiches on. Turn and do the first row which is:
K5, pm, slip, K1, psso, *K15, inc2, K15, slip, K2tog, passo, repeat from * 6 more times, end last rep with slip, K1, pm K5.


When I count the stitches I get 152 not 150 which is what it would be including the first tie on stitch.

Am I wrong?