Useless App or just cheats

My Polar activity tracker records my works and syncs with discovery app. I've never had a problem previous but now twice in this week i do an hour plus work out and polar records it at that and yet discovery says a 30 minutes plus work out and gives me 100 points? Ive always been doing an hour plus workout with a heart maximum heart rate of 60 tp 70 percent above average. Useless app or discocery just doesn't want us to meet our goals....