Help me understand--Lizard Ridge pattern

I’ve done this row FOUR times now, and it’s still not coming out right, which makes me wonder if I don’t know how to read the pattern… I should say that I DID do it right last night, and now that it’s time to do it again, well, it’s just not working. I get to a point where it says p20, but there’s only 16 sts left on my needle…

Please help.

Here’s the row:
P5, w&t, k5, turn work, p4, w&t, k4, turn work, p19 , [w&t, k8, w&t, p7, w&t, k6, w&t, p5, w&t, k4, w&t, p20] to last 10 sts, w&t, k8, w&t, p7, w&t, k6, w&t, p5, w&t, k4, w&t, p16, turn work, k5, w&t, p5, turn work, k4, w&t, p4.

When I get to that ‘p20’, I’ve only got 16 stitches left the second time I do it.

I’ve been doing it like this: Following the instructions starting w/ the P5, doing everything in the []'s, then repeating everything that’s in the brackets since I have more than 10 sts left–>Is that wrong?

Someone please help me… I’m so frustrated–especially since I got it right last night some how… :shrug: