Before I got the negative energy, I attacked someone and the page timed out (could not query players IIRC). So now I am -25 energy. It appears as though it took my points, allowed me to refill, do 1 attack, then took that energy and set me -25 energy (for the 1 attack I did). Ofc the 25 points I used are gone. (had 2k points now only 1,975).