Your description of the problem is accurate. You get a milestone progress point ever time you use the ability, but not for every second. So if you use it twice in a game, you get 2 points, even though it is activated for maybe 6-8 seconds I think. I'm o.k. with this, but the description for the milestone should be changed.
Yeah I can confirm that it's only counting the number of times you use it. Once again, whoever is writing these challenges and creating how they are completed are not on the same page. I'm not sure what the process is but there are several occasions where milestones and daily challenges don't match what the description says to complete it. I'm no developer, but how difficult is this?
