Thanks for the update Bev about the length of cook on the samples, and Wolfy’s indication. He seemed to have the pattern that you have described, just needed to check. You both look like you are having fun working through this task.
In this situation you knew that a sample wasn’t there so Wolfy was redirected to the place where you did know where a sample was. On re-watching the video it appears that a pink flag is there and is close to where he had found a previous sample, so there may have been a pool of scent where he was digging even though you had previously removed the sample. The timing for re-direction was spot on and this process was nice to watch.