Well that doesn't match their chart2.php page by a long way, the chart shows 98.4% blocked, add the User Dependant 0.8% gives 99.2%. Yet the Results section shows 98.0%, so 99.2% would have been a ranking of 4th; that would make a whole heap of difference.
Some sort of statistical ranking over and above the detection rate, presumably false positives and the cluster grouping fudge factor, drops the overall from 99.2% to 98.0%
There were only 20 products tested yet 21 shown in the chart only Microsoft not appearing on the chart.av-comparatives.org/chart2.php chart making that 22 tested
Colour me confused, not that I'm overly concerned.