Besides,

#Update : Man_in_the_train confirmed that Avast Kill5 tests were wrong(kindly see the comments). He will be conducting fresh tests, results of which we will bring you at a later date.

MAN_ON_THE_TRAIN on AUGUST 23, 2015 2:52 PM
You are right, Avast passes kill5 test even though it kills its process.
I just went back to the Avast Premier test after reading your comment. I actually missed the fact that Avast’s services bring the Avast application up. It’s services can’t be killed using kill5 test, so I updated the results.