Umm, I just discovered an interesting problem. I accidentally started a new account trying to figure out how to link and existing account to Steam. (I was unaware at the time that the game doesn't yet support this.) Just for shiggles I thought I'd play a bit on the new Steam account since my other account was out of free energy for the day. This is when I realized that If a Steam account has the same name as an already existing SK account then the two accounts share ME.
They don't, mine are the same too. You've probably got two free accounts on the same computer, which means that they will share ME as free accounts. More of this on the Energy FAQ.