Sometimes when I bake cupcakes, they rise really oddly. Some will have beautiful domes. Others will be flat. And some will look like freakish globs. I use an ice cream scoop to get the same amount of batter in each cupcake, so that can't be it. I blame it on the fact that my gas oven doesn't bake evenly.
I found a good way to deal with those unsightly tops - cut them off!! Frost your cupcake. Heck, add some sprinkles. And then add the top part back on. And then add a little bit more frosting. Mm... Double-decker. Perfect for those who love frosting.