We just had a meeting with our trainer. We are putting Pepper (yes! We finally named her) in private lessons. He also said what Katelin said about limiting their space. Our puppy is only allowed in the basement right now- in our main family room. We take her out of her pen only when we are going to be right there with her playing. Otherwise she is in her pen which has a potty pad and her crate. Also we only keep her out for short periods of time (unless she is on my lap sleeping). Our trainer said that often puppies have to go potty after they've been running around, so while your puppy may have just emptied his bladder, being outside my have stimulated him to go again.
I am so not an expert by any means though- I'm just following the advice of our trainer. We are doing leash training/correction with our puppy, which limits the dog to being within leash range at all times.
I will try posting a picture of Pepper again.
http://img.photobucket.com/albums/v2...o/DSC03308.jpg