Valve adjusting on a Solid cam

Well I went throught them and this is what I came up with. It seems to be only doing it on one of the heads. When the valves are closing it almost seems they get stuck than they snap up making the noise. These are Edlebrock performer alum heads. They have been sitting for about a year. I bought them brand new for this engine ran them for about 200 miles till I blew up the motor and they have been siitting since. Is it possible to valve seats are dry causing them to stick?