I also use xmrstak, tweaked to use 2 gpu threads it performs just as good as sgminer.
You going to share that portion of the amd.txt file? The "help" section - such as there is - doesn't explain how to set gpu threads.
Hey, to use 2 threads per gpu, just copy every line for your gpu's, so theres 2 lines for every gpu, thats all.
this is for my 4 gpu's with 2 threads per gpu:
"gpu_threads_conf" : [
{ "index" : 0, "intensity" : 432, "worksize" : 8, "affine_to_cpu" : false },
{ "index" : 0, "intensity" : 432, "worksize" : 8, "affine_to_cpu" : false },
{ "index" : 1, "intensity" : 432, "worksize" : 8, "affine_to_cpu" : false },
{ "index" : 1, "intensity" : 432, "worksize" : 8, "affine_to_cpu" : false },
{ "index" : 2, "intensity" : 432, "worksize" : 8, "affine_to_cpu" : false },
{ "index" : 2, "intensity" : 432, "worksize" : 8, "affine_to_cpu" : false },
{ "index" : 3, "intensity" : 432, "worksize" : 8, "affine_to_cpu" : false },
{ "index" : 3, "intensity" : 432, "worksize" : 8, "affine_to_cpu" : false },
],
Since im using xmrstak again, i can also let my cpu mine at the same time, since its a fx8320 and it does 430 hashes its worth it.