This is beyond what I know about tomatoes. Going to guys that the plant has some sort of diploid genetics in it and that is why you are getting some of these weird looking fruit. There are all kinds of hidden genetics in all plants and this one plant is a bit messed up. Given you want to use this one plant for future growing, the best thing to do is take seeds from as many fruit as possible to plant out, and after you grow many plants, weed out the inferior plants. Whether there is good scientific reason for this,or not, but I would just take seeds from good looking fruit just to make sure. Tom
