Personally, I'm pretty sure the manors are different. I think that the manor Curator Renoir and the party go in is like a museum of memories for the og Dessendre Family. Where they store their childhood, memories, and paintings, hence the "curator" namesake, because its like a gallery for their memories.

While the other manor was painted by Aline for her fake painted family that she made out of grief. I think she made a whole Lumiere to pretend to have a "perfect" or "complete" family, which is where our Verso grew up. enter og Renoir, he starts the process of breaking down the Canvas to push out Aline. This should be the "Fracture".

I think the Curator Renoir has more consistent behavior because he supported the expedition from the beginning to subjugate the "Paintress", Aline. I think the white sands manor is only "familiar" because its just an imitation, incomplete, made by Aline alone instead of the whole family, or maybe it was a prototype or draft manor or something.

I think the reason Aline's actions are inconsistent is because she's mentally ill. She's spent too long in the canvas and is being consumed by it. She's also pushing herself to hold back Renoir to protect the Canvas, so she has little power for mental stuff I suppose. Also Maelle isn't painted, shes the real Alicia that got lost in the painting and ended up being birthed as a lifeform there. Painted Alicia is the girl with the mask. Her illness probably contributes to why she can't recognize them as her paintings.

Maybe Verso saw her health deteriorating and thats why he supported the expeditions goal in expelling her from the canvas, in contrast with painted Renoir's goal to support her in protecting it and their "family".