The Paths not taken. Edited

(Never mind, I've been directed to rereading the keystone. Seems strange mechanic and wording, but not bugged.)

I'm getting single DIV card drops in maps and not doubles with the keystone allocated. That's not working correctly at the moment right?

It seems like the ones I'm getting are from alternate maps. I guess that part is working, but it is not adding a second drop?

I'm not using incubators or anything else that would be dropping the cards, as far as I'm aware, so should be applying.