As bad as it sounds, that is a relatively low-cost program. The professional level programs are over $1000, so the numbers it's putting out still don't surprise me. Try playing around with some of the settings, and make the engine more "realistic" for ethanol. Changing to a higher or lower compression ratio might be able to give you something more along the lines of what you were expecting. Also, try running gas & propane with the different numbers, that'll at least give you a benchmark as to how consistent the number outputs for the program are.

And damn you, you're just giving me another reason to spend money on starting up a 545 project.