Shampooing: I pat and I squish; then when I start massaging, do I use thesame technique with my fingers as when I massage #18 oil ?

Yes to get full usage and benefits around each root up there, you
should do this.
#18-ish shampooing patterns also assists in doseing/treating the scalp
and hair evenly with the product not only to physically cleanse, but
doing it so adds body, and definitely aids in detangling later.

We don't use harsh chemicals to clean for you, or our herbs
wouldn't work...so lets get into hair as well as into scalp with
Shampoos and conditioners into the scalp, applied like recommended,
scrubbed in gently with what's in the hair and what's  left on your
hands, in the same horizontal scalp pattern as your #18 Scalp oil.