I want to be sure I am visualizing what you are trying to accomplish... Is it this something like:
| Occurrences |
Page 1 | X |
Component A | Y |
Component C | Y |
Component B | X |
And because you have 2 "Component A" and 2 "Component C", the issue is that they are rolling up into the same row?
Adobe is designed to roll up dimensions based on "same value"... so if you are trying to track multiples of a component with the same name, you will have to add a distinguishing factor... like maybe serialize the components based on placement order.....
"Component A-1,Component B-2,Component C-3,Component A-4,Component C-5" (basically apply a serial against all the containers in the order they appear)
OR
"Component A-1,Component B-1,Component C-1,Component A-2,Component C-2" (serialize per container type, each container has its own index)