Ok do this - its like mixing music - just set everything to zero and start again.
so you run a .Bat file obviously - set it to just start CGminer and only set intensity I 18
and tell me what happens - so copy your .bat and just run a vanilla one take out the screwing with the voltage and TH and Sharders - if it works , slowly bring things back until you find the problem.
** you can leve the SET group i.e GPU_MAX_ALLOC_PERCENT=100 etc.
Ok so even with nothing but SET groups and intensity, I get the same behavior. Maybe a little bit better, but still same problem.