Per Epopp -- posing what I experienced today here.
Playing on AU Scourge -- had a large box full of various gene, various berry clones -- I clicked on sort A-Z and it combined all the clones into one gene-set. IE, all the blue berries got combined into one stack, all with the same genes now. I whipped up some more clones, and will attach screen shots of before and after.
in the before, all those clones have different genes, so they shouldn't stack. After sorting, as you see, they have been merged.
Hope this helps!
Server: Scourge