JR, I have an F4 tomato that's doing the same thing. For some reason this line produced enormous clusters from F2 on. Apparently there is a gene that suppresses 'enormous cluster' and in the breeding process it got de-activated. We thought it might be environmental but a friend grew out the pink line last year and clusters continued to be enormous. Now this year I'm growing out the black and the enormous cluster has put out a few leaves and is continuing to grow and make more buds, leaves, buds etc etc.
It doesn't follow the normal pattern of a leader though, which has 3 leaves between clusters. Just a leaf here and there, then pushing out more buds...
It's basically a plant where you only need one cluster of fruit to load 'er down.
Maybe you have a mutant CP?
