the bug occurs when the user(me)Lo,gged in to, the shared computer..both of us(my brother)...i have 100 mist energy and my brother has 35 energy left...when i logged in the mist energy meter showed only35 energy left..(i used the computer after my brother..and we used separated acc ...and he doesnt even know my password
This is by design. The solution is for one of you to buy some amount of CE, then the mist won't be shared between your accounts.
http://wiki.spiralknights.com/Energy_faq