So there were two false positives and that was the reason for the failure of 'the Linux' version of avast.
You have to base your decisions on your personal experience. I have had avast for a little over 4 years and during that time there were failures but also awards of vb100. There are many AVs that fail from time to time if you are going to change AV for every bad report you will be hopping around like a one legged man. You have your own experience to call on.