If I have a Contact that is part of a Campaign and a Potential is created for the Contact, should the Campaign Source field in the potential be populated with the Campaign? 

Assume the Campaign is still open.

Is there a way to see the Potentials associated with Campaigns when in the Campaign Module.  See the image, yellow highlights.  I would think I could click a link and it would show me the 2 Potentials in Revenue and 1 Potential in Pipeline.

Question 2A)  Does Revenue in the below image also include Closed Lost revenue?

Question 2B)  In the image, see the red highlight, why would I have 3 potentials associated in the yellow highlighted area, but there are no potentials associated with the red highlight. (The red highlight links to the potentials)

I haven't quite figured out how this association is made between a Campaign and Potential. For example, if I go to Campaigns Module, open a Campaign, and look at the Potentials associated to that Campaign, I am not sure why some Potentials are shown, while others are not.