I think that I can help you.
In the first clip, you must to change the warp mode to "complex", or "complex pro" to change the pit. Otherwise, when you shift pitch, it will change automatically. Yours is in "Re-pitch" mode.
We need to be careful with these warp modes, each of them has its particularity.
Now to extract the loop from the arrangement screen and switch to the session view is very simple. You have to select the loop you want, and drag it straight to the slot in the session view. And for it to work as a loop, you need to enable the "loop" button by clicking on the clip, and going to the bottom left.
Hope this helps.