I noticed that after 1.09c any loops in the system were not resolved, after removing my loops and creating a hub/spoke layout where every inventory/request pipe was on a spoke solved my items bouncing between routing junctions.
I also noticed some funky behaviour with deep torage units, even though it was a 20 blocks closer to the input all items happily moved past my deep storage units spoke and went for the chest inventory. To solve this i messed about with the broadcaster chip (hiding 1 per stack setting) but also made the items pass the interface pipe on route to the chests.
Not the cleanest solution, but i have not found a way to filter a whole network segment yet, the routing pipes are black magic to me ;-)