Component center cells in schedules

Hi

I'm trying to get a hang on components center cells. I've created one with 3 piles and a pile cap in concrete to start with. 

When I place it in a design file, the cells elements are not handled as normal structural elements. For instance I can't see the piles in schedules, nor in a report. 

In the image below, one pile group is still left as a cell. The other one have I used the tool "drop element" on. 

Regards, 

Robert