Deluge only downloads 1 file at a time

[Madams9]

Linux spike 4.1.8-desktop-1.mga5 #1 SMP Sun Sep 20 12:39:07 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
Deluge 1.3.11
libtorrent 0.16.18.0

I recently had a fiber connection running 100 Mb/s installed after dealing with 1.5 Mb/s DSL for years. I expected to be able to up my torrent traffic no that my bandwidth is no longer pathetic. I have Deluge > preferences > queue set to:
8 total active
4 total downloading
2 active seeding

Edit: meant to mention that the one torrent downloading is soaking up no more than 90 KiB/s. Global Bandwidth in Preferences is set:
318 max connections
-1 upload slots
-1.0 max download speed
108.0 max upload speed
50 half open connections
20 max attempts per second

Per Torrent Bandwidth is:
127 max connections
5 max upload slots
-1.0 max download speed
85 max upload speed

Also, while I'm running at about 100 Mb/s, my VPN is considerably more limited - about 10 Mb/s. I set Bandwith with this in mind.

The progress column shows 4 torrents "Downloading" but only 1 of those torrents is actually connected to seeders and peers, and is actually downloading packets.
What have I missed? According to my research, I should be able to get more than 1 torrent downloading.

Any help appreciated.

Mark

Edit: found this https://github.com/arvidn/libtorrent/issues/180 Seems equivocal about the libtorrent library, but installing 1.0 is really not likely here. Also, do_not_count_slow_torrents is not a factor - I've never used it.

[thepace]

ur on 100mbit ,try setting everything to higher valuesexcept half open and connection attempts. max connections to 250-400 , rest to slots, speed dl/up. if i were u i would even set total active and seeding to -1. if u want to download more torrents at once increase total downloading too.

if u have a need to limit ur upload speed ( imo u dont have to at all) set it to value between 40000 and 90000. i believe u arent getting enough dl speed because u limited upload speed too much

edit: and i missed initial question: if libtorrent has that bug documented and u have problems because of it U DO HAVE TO upgrade it

[Cas]

That issue has nothing to do with libtorrent 0.16 specifically mentioned in the report...