Not trying to butt in, but it would be nice to see if those 6 avast detection were files which you have trusted in Comodo or if they are f/p if so they don't count.
You should have scanned them with malwarebytes or something that's a strong secondary opinion scanner to see if they not just traces or temporary. If so they can't do anything.
They were not trusted files. They were simply missed by CIS. And to be fair, when I was using Microsoft Security Essentials awhile back, it never saw those files either.
Also, I agree with Eric, a Detection test is nothing compared to prevention. If you can have the best hips and sandbox out there and nothing can hurt your system, who cares about the detection tests if the av doesn't catch it, the sandbox, or better yet the new sandbox in 6.0 will stop it.
I agree prevention is great, but detection is also important for what may not have been prevented.