Pattern Help

Good Morning,
I am doing a knitting pattern and I am not sure that it is correct.
I have 31 stitches on my needle, then I have to do the following:
Inc in 1st purlways, p14 (k1, yfwd) twice, k1, p13, in in next st purlways, p1 [33] sts.
I end up with more than 33 sts on my needle!
I cannot see where I am going wrong, the pattern comes out fine if I carry on but always end up with my sts on the needle than what the patterns says.

Welcome to KnittingHelp!
What is the name and designer for your pattern?
Have you looked further in the pattern to see if the numbers make sense? Maybe this is a one time mistake?