I wouldn't worry too much yet about the puppy play (biting and growling) Make sure you supervise them together and step in if things get too rough, but let them establish their own pack order. With two pups that young it may take awhile. Once they start to work it out, treat them the way they have estblished. Which ever dog is dominate, feed first, pet first etc.

Does Cody bite or growl at people?