% Processor Time on Process vs. Proccesor

Question

I'm looking at a visual studio loadtest results, and something does not make sense.

The (_Total) % Processor Time under Process category is almost linear.
The (_Total) % Processor Time under Processsor category makes saw teeth pattern.

Question 1: What is the difference between the % Prcessor Time under Process category vs. under Processor category?

When I look at the % Processor Time under a service process that I was running the load test against, it makes saw teeth pattern, so this looks related to the Processor category...not Process category?

Question 2: How come an individual process's % Process Time affects the Total % Process Time of the Processor, and not of the Process?