You need to remember two important things. One, Jo is still a puppy even though she may be getting bigger and doesn't look like the little ball of fur she use to be. Expect your lab girl to have high energy until she is at least two and possibly three years old.

Two, she is not ignoring you. She just doesn't understand what you expect of her. She does not think in the same way as a human and you can not expect her too. Plain and simple she is displaying typical behavior for any dog her age who is not trained. She needs obedience classes if you want her to listen to you when you speak to her. Puppy kindergarten class is not considered an obedience class, it is more for Socialization.

Using treats to get the dog to understand the behavior is an excellent training tool. At first you use the treat all the time. Once you recognize the dog is consistently doing what you request, you start to fade the lure. Perhaps you only give it every second time. You always give verbal praise though, everytime! Again when you recognize the dog is coming or doing whatever you ask on a consistent manner, then you fade the lure even further. Perhaps a treat is only 3 times she listens. It is important to always use the same cue in calling her and in the same manner. Single words are more effective than phrases. I give the dogs name to get the attention and COME to tell them what to do. In other words it would be DIXIE .... COME. She will catch on and come reguarly.

As far as sitting for periods in excess of a couple seconds..... this is something even reguarly trained dogs have to work up to. This is where the obedience class will help.

Lastly, getting upset with her will only slow the training process down. It will confuse her more than help her because she will not understand why you are upset and will perhaps associate it with something other than why you are upset. Positive measures are the best! If the dog does not do what you want then you need to show her in a positive way. But don't expect her to listen too much if she is not trained. Not because she doesn't want to please you but more because she doesn't know how to please you. I strongly advise an obedience class or if that is not possible getting a good book on positive dog training (clicker training is great too) and learn to communicate with your baby! You will not regret it as it will enhance the bond between the two of you!