Jpbunka I feel your pain. I have what looks like the same issue. I have come to believe it is Septoria leaf spot or possibly early blight. I have been pruning the affected leaves/branches and using Daconil once a week. I thought I had it contained but overnight it got loose again. Today was the day I usually spray them with Daconil. I look them over everyday and they looked fine yesterday. I started spraying everything in my container garden with Daconil when the fungus showed up on my tomatoes back in the end of May. So far it has not spread to any other plants but it is on all my tomatoes now. Good luck.
