The problem

I selected [Bittorrent Clients => Deluge] and it installed Deluge v1.3.15 (May 12, 2017) with an incompatible version of Libtorrent v1.1.7 (April 9, 2018) (Ubuntu pkg: libtorrent-rasterbar9)

In my particular instance, this created an install that ignores all Global Maximum Bandwidth settings whereby torrents consume all available bandwidth unless each individual torrent is manually limited, but there are other known issues.

As best as I can figure from what I've read, Deluge v1.x is only compatible with up to Libtorrent v1.0.11

There has long been talk of a Deluge v2 that will be compatible with Libtorrent v1.1.x but it has not been released yet (if ever). ;)

I noted that in the installer script there is this Echo'd line:
"Add qBittorrent-nox so we can get the latest libtorrent-rasterbar that it keeps up-to-date..."
but Synaptic did not show the qBittorrent-nox package as being installed, if that means anything. The other packages I'd have expected to see seemed to be installed fine and the Deluge components ran but for the incompatibilities.

My Linux distribution and version is:

• lUbuntu Desktop 18.04 LTS

I'm seeing this behaviour on:

• A fresh install

I'm not a dummy, so I've checked these!

Yes - I'm using the latest version of AtoMiC-ToolKit.
Yes - All my Linux distro packages are up to date and I don't see any errors while updating.
Yes - I've checked there are no current open issues relating to my problem!