Ok, sounding better... When I mentioned compression, I meant compression ratio. But your compression reading indicates that your ring seal is probably in pretty good shape. Glow plug at the end of the adapter, in much the same postion as the electrode would be in a spark plug sounds right. I would try a fresh new plug to start, and preferably a hot one like for a four stroke. As far as ignition timing, that's the trick. Spark ignition "goes off" when you set it to; glow ignition "goes off" when it is ready to due to the heat of compression and the catalytic reaction between the alcohol and the platinum in the glow plug. That's why I suggest a hotter plug. It will effectively "advance" the ignition timing of your glow setup, and may help with the problems you describe.

Good luck and keep after it,
AV8TOR