Can I do this tutorial with DW CS6? I couldn't find some of the things such as "Insert Structure". I did find the Div tag under Common but couldn't find the Insert Header, I could only find Head:Link and the items in the associated drop-down. I am in Designer view.
This tutorial is designed for Dreamweaver CC. You may be able to struggle through it using CS6, but you'll probably come across inconsistencies such as the one you mentioned in your post.
A couple potential solutions:
Hope that helps.