Hi Manny,
Records with same set of characteristics will be aggregated only for unique request IDs when you load your infocube.
If you have records with same set of characteristics across different requests IDs they will be aggregated only when compress the respective request IDs.
Suppose you have records with same characteristics A B and C in request Ids 000001 and 000002, they will be aggregated when you compress request IDs 000001 and 000002.
Thanks
Nayab