My guess is that Demerzel manipulate then making them "forgot" decision they took that she didn't want, until they came to the decision she consider is the correct one.

My guess is that Cleon I (himself via the chamber, or via some sort of dual-personality presence with Demerzel) has been racking up memories this whole time because he isn’t truly gone.

Perhaps Empire had some analogue to the Prime Radiant, where his consciousness is tied to Demerzel in exchange for her continued existence.

From what I gather, each clone only gets their 75years of memories before they are put down for the next in line. With memory editing, they’ve slowly been getting smaller and smaller memory banks.

I wonder that till the end of episode. Him meeting OG Cleon makes me think he might not survive to try. I've been wondering about how all the past Cleon's nears the end had a similar amount of memories wiped. Dawn and Dusk just used the previous clones base line to compare their own and see if they were similar and not being too altered by Day. It's like they tend to follow a preset life cycle and hit stages in their life where memories need to be erased. I wonder if Dusk naturally becomes curious about the memory erasure in this part of his life.

Can't wait till the next episode with Demerzel and hopefully get some answers.

What if they are actually killed a lot. By enemies of the imperium or Demerzel itself, and the memory back up always lost some before the assassination. They always talk about the clones and how they would be replaced for a clone.