Spicefly SugarCube only picking random tracks

I'm having difficulty getting SugarCube to return non-random mixes. I'm running

Ubuntu 12.04.5 LTS
LMS 7.7.5
Spicefly 4.70

<server>:10002
shows plenty of tracks to mix. A test mix works fine.

LMS->Settings->Player->SpiceFly SugarCube-> Available MIP Genres
shows all of the genres scanned so I'm assuming that MIP and SugarCube are communicating.

However, when I try to play a mix SugarCube History shows only random tracks chosen.

I tried all of the troubleshooting tips (http://www.spicefly.com/article.php?...roubleshooting). Part of the log file looks like this:

[16-06-21 14:52:45.7590] Plugins::SugarCube::Plugin::gotErrorContinue (2) Random Track Selected to match Current Playing Tracks Genre
[16-06-21 14:52:45.7598] Plugins::SugarCube::Plugin::gotErrorContinue (2) Adding Track; Slim::Schema::Track=HASH(0xdf48328)

Just for kicks I installed LMS, MIP and SugarCube on a Macbook and got it working perfectly, so it must be something I'm doing or not doing under Ubuntu.

Any help is appreciated.