Logan did obedience. He should have done Agility but we didn't have that till he was too old :~D
Logan usually had great moving exercises but (if you remember) would mount the dog next to him in the sits and downs and disqualify. It was pass or fail with him, if he stuck the sit, we were OK but it took a lot of work and cursing and abuse and finally a workable system to get him to stick the sit. He was the most stubborn dog I've ever known :~D
So he needed three of those greens on the left for his CD, and we ended up with one extra because he completed during the first day of a two day show. The green one on the right with the medallion was is only qualifying score for CDX, at a lab specialty, where he won the class. But we weren't able to complete is CDX because he was getting older, and he kept injuring himself over the high jumps. They're so high in obedience, 1.5X his height, and as a relatively heavily-built dog, it was too hard on him to jump him on concrete where most shows are. I tried entering him in only outdoor shows on grass, but once he tore his shoulder he was just too vulnerable. So we gave up.
Shelley MIGHT do the sit now. She sits pretty well now while we walk the agility courses - but I have to turn occasionally and give her the beady eye. She doesn't mind sitting next to other dogs - in fact we have a picture somewhere of her and her good friend Tori the Black Lab sharing an extra pause table while waiting in "sit" for us to complete the walkthrough. They usually sit together and are known as "The Bookends."
(She can do it - she's young still, only 4. But she would have to practice.)