The results are deduped. The deduping is currently set to 'cheapest lead-in'. This means that we'll take the supplier with the cheapest lead-in room type and discard the other suppliers.
A roadmap development will be to dedupe at meal basis level. If this is the case then you could have all the room types for the cheapest supplier (Supplier A) on, for example, bed and breakfast, and all of the room types for the cheapest supplier (Supplier B) on, for example, half board.