Thank you for reporting the issues you experienced! I am sorry that your gameplay was marred by battles that didn't let you play. I am not sure exactly what caused this, but I will look into it. I suspect I need to upgrade the servers now that DemoniCore is starting to get more traffic.
I sent you a little DCORE to hopefully make up for your less than great experience. I really appreciate your support, and the fact that you took time to detail what happened - this kind of feedback is crucial for me to make the game better.
RE: DemonCore Update: Energy level bug fixed