Hi Linda,
I noticed on these searches that you did not have your treats in hand, so you could not reward quickly.
Not sure what Kim will say about your question about pairing, but I think having a couple of treats in your hand to start with you will be able be pay more quickly. In my practices I usually have about 3-4 treats in my hand so I can treat quickly with several pieces.
In trial I usually only have on piece in my hand, I can still pay quickly, but less likely to drop anything.
In your threshold exterior you did have treats in your hand 🙂
Just my observation, but Kim is the boss lady 🙂 hehehe