Latent Unlearning?

We started tonight's training with a little "sit" work.  It went so well two nights ago and, tonight, it was pretty much "huh?".  Seemed she had never been clicked for a sit before.  Is there such a thing as latent unlearning?

But on to the work of running around the cone and she was back in great form.   I quickly moved back again to about 25 feet this time and out she went to that cone, to the back side and running back once she hears the click.  Next it was to true latent learning.  I went back to the puppy teeter, this time deciding I was only going to "pay" for her tipping the board, however she did it.  Previously she had understandably seemed a tiny bit hesitant to do the tip side.  But tonight right from the start she was slamming that board down and looking for the treat. 

On Sunday it was another day at the show.  Shasta had a great time since she got to play with puppy cousin Smokin for quite a while.  She also got to play for a bit with slightly older portugese puppy Jacky Kott.