It's actually a year old. Sorting by hot has some weird problems. The devs partially fixed it, but as you can see, it still doesn't work as intended from time to time.
From what I know Android doesn't let full knowledge of the processes running on the device. In my case as I was getting desparate I just factory resetted it and its much better now.
It is closed source, but you can disable its internet. I have found SystemPanel 2 full version with ADB usage stats access incredible in terms of the information it provides, even on wakelocks and so on. Nothing compares, and it feels like one of those KitKat/ICS era apps that used to show all the system information.