Shaman X

In the shaman X description it states that when gaining this ability, you get to pick traits from a single sphere.

Now:

- Does gaining this ability multiple times work?

- Do you need to re-select the same sphere every time you get this ability or can you select different spheres for each instance of Shaman X?

- Lastly, does it work when you get Shaman X from different branches (like the Shamanism branch, and the Moon region branch)?

- Can you select opposed spheres for different Shaman X instances?