Help -- can't get the right number of stitches!

So I’m trying this pattern:
http://whatgivesblog.blogspot.com/2007/08/blue-leave-shawl-pattern-remember-this.html
And on: [B]Row13:[/B] k1 tbl, k2 | yo, m1, yo, k3, k3 tog., k3, yo, m1, yo, | k2, sl1 wyif, turn. You just started a new leaf on each side!( yo, m1, yo is the start of the new pattern repeat!) = [I]19 stitches[/I]

…I can’t figure out how I’m supposed to have 19 stitches. Sometimes I get 18, other times, 20. Anybody know what’s up here?

My count looks like this:

k1 tbl [COLOR=“Blue”]1 stitch[/COLOR], k2 [COLOR=“Blue”]3 stitches[/COLOR] | yo [COLOR=“Blue”]4 stitches[/COLOR] m1 [COLOR=“Blue”]5 stitches[/COLOR] yo [COLOR=“Blue”]6 stitches[/COLOR] k3 [COLOR=“Blue”]9 stitches[/COLOR] k3 tog [COLOR=“Blue”]10 stitches[/COLOR] k3 [COLOR=“Blue”]13 stitches[/COLOR] yo [COLOR=“Blue”]14 stitches[/COLOR] m1 [COLOR=“Blue”]15 stitches[/COLOR] yo [COLOR=“Blue”]16 stitches[/COLOR] | k2 [COLOR=“Blue”]18 stitches[/COLOR] sl1 wyif [COLOR=“Blue”]19 stitches[/COLOR]

Thanks for the stitch by stitch breakdown, WMH.:muah:
I’ll give that a shot!