Hmm, I figured as much for Scantime and Expiry. I've always left queue to the default of 1, no matter where I've been. I can try it again later after the updates.
Queue is actually "extra work items in queue", that's why when using 0, staged work (ST) is still at 1. It was useful back in the days before stratum, but since now work is locally generated (LW) at will by cgminer, it only serves as a hindrance on coin switches, although it shouldn't be happening.
Terk, are you sending "Clean Jobs == true" on the stratum work packet? (params[8] == true)