We have the same problem with our dog. We also went through training, but still have the jumping/ nipping problem. I have found that if I have treats ready, and then approach her, showing her the treats, she will sit for the treat, allowing me to pet her and talk to her without her jumping. Our trainer also suggested that when we first come home, completely ignore her (our dog is baby-gated into a separate room when we're not home) until she is calm. Then praise her and reward her and pay attention to her. This seems to work pretty well too. Our trainer told us NEVER knee a dog in the chest; it can seriously injure them and doesn't teach them "better" behaviors.