From what I understand, memory vestige: light are supposed to turn into a memory or something for 2 aspects, but I have a stack of 10 in my inventory, and I had a stack in my postmaster. I deleted the ones in my postmaster, thinking those where the problem. I've tried doing the cyst to get more to drop, but nothing. I don't know if this is a bug, or im forgetting to do something, but I'd really like to get these last two aspects.