Possibly related issue. I have two files in my download queue, and two primary servers configured. I set file 1 to only use primary server A (free server with short retention), and file 2 to only use primary server B (pay server with long retention). I enable the "Download one collection at a time" option. When I download, it downloads from one server at a time, which is what I want, but it only uses a fraction of the bandwidth limit I have set. So if I have the bandwith limit set to 80%, and servers A and B each have 4 connections, when server A is active and server B is idle it's capping the bandwith for server A at 40% of the available bandwidth instead of 80%, and seems to be reserving 40% of the bandwith for the idle server B.
