This happened yesterday, and I gave it a day to see if it worked itself out.
I -think- I opened a character from a bronzium yesterday. Specifically, my 11th light side character. I had a half dozen or so bronzium cards and was just blowing through opening them, so I bypassed it pretty quick. In fact, I didn't really catch anything until I saw I had unlocked the achievement for getting 11 LS toons. My character list only shows 10.
Imgur album is my achievement screen showing my supposed counts, then my dark side characters (which matches) and then my light side (one short).http://imgur.com/a/x5G7l