Green Baby Blanket, How to Make 2-dc Clusters

In the comments to my Green Baby Blanket pattern, Kelly wrote:

Row 1: please explain how the 2dc-cluster works? How do I keep it all in the same stitch? :-)

I took a close-up picture of clusters in Row 1. The photo shows the following instructions:

(2-dc cluster, ch 1, 2-dc cluster, ch 1, 2-dc cluster) all in next ch

Remember that a 2-dc cluster is two unfinished dc worked into same space (or same stitch), then finished together.

Here are the step-by-step instructions for it:

1. Yarn over, insert hook in stitch, draw yarn through the stitch, yarn over, draw through 2 loops on the hook. You now have 2 loops on the hook left.

2.  Yarn over, insert hook in same stitch, draw yarn through the stitch, yarn over, draw through 2 loops on hook. You now have 3 loops on the hook. 

3. Yarn over, pull loop through all 3 loops on hook. Your 2-dc cluster is made!