Red Isis Candy?

[MarieV]

I'm currently growing Isis Candy from seed, and the fruit is just now ripening. However, instead of the red-orange-gold marbling, it's just plain red. The first several fruit ripening are about 1.5" in diameter, and the first one weighs 1 oz. All the other fruit are about 1" in diameter or smaller, like more typical cherry tomatoes.

What do most people get when they grow Isis Candy? I know it's not common to get the striking colorful marbling shown on most photos for Isis Candy, but I was expecting a bicolor or at least the sunburst pattern on the bottom, not just a plain red cherry tomato (as shown in the photos below). I'm also getting soft, almost rotten bottoms on a handful of the fruit, like blossom end rot (see brownish blossom end on tomato directly below the red one in the first photo below). I didn't think that happened with cherry tomatoes.

Almost ripe fruit on Isis Candy


One fruit blushing on a truss of Isis Candy


The red Isis Candy tomato with Sun Golds for comparison