It can be like that at times. I know a guy that fishes Green, and he told me ..... one day I caught them out on the main lake, then the next time I couldn't find them on the main lake & ended up fishing in a creek to catch them.
That told me that the fish are roaming, big time, following the Shad.
According to this : Louisville District > Missions > Civil Works > Water Information > Updated Lake Temperatures and Dissolved Oxygen Lev > Green Profile .... the thermocline at the dam had dropped to the 20ft level last week (down from the 15ft level of the week before). You may not have been fishing in deep enough water