Nice shots. Those are always tough. What are you shooting and how are you focusing?
Pops
I'm using a canon 40D with a canon 300 f/4L + 1.4TC. The 40D will miss focus some times and you have to keep a careful eye on the viewfinder to make shure you got a good focus.(I forgot )
I use the center dot---meter lock---focus lock---recompose and shoot