@carlacarnevali - processing 1 queue item at a time is precisely the intended behaviour; you need to create your own dispatcher mechanism. Please check out the documentation.
@RPAForEveryone - Yes. You also need to disable Persistence. Please check out chapter Settings for Attended Processes in the User Guide.
@ctutu We played around with various scenarios involving multiple DU queues - including the one you mentioned. We found that debugging/managing/scaling become a nightmare very quickly. So, for now, we don’t have any plans to go in that direction.