My "green" peppers are very small, and they are red. I'm assuming the plants were mislabeled, but why are they so small?
Most red peppers are actually green pepper varieties. They are simply left on the plant longer, which results in them turning red. If you leave your green peppers out long wnough, this will happen as well. As fo the stunted growth, it is likely due to the extremes in temp this year.