I am just starting Square 3 of this pattern

http://www.garnstudio.com/lang/us/pa...d=4769&lang=us and perhaps I'm complicating this instruction too much, but I don't get the part about one garter stitch. If anyone can help, thank you!

SQUARE 3:

Cast on 38 sts on needle size 5 mm / US 8 with Nepal. K 1 row from RS, K 1 row from WS, K 1 row RS and P 1 row from WS. **Now continue in M.3 with 1 garter st each side** until square measures approx 1 cm / 3/8'' less than square 1 (adjust to a half or full repeat). Now K 1 row from RS, K 1 row from WS, K 1 row RS and bind off from WS in K sts.
Each row is 38 stitches, and the pattern is 8, so where are they talking about a garter stitch on each side?

Here is the pattern, M.3:

Thanks!