it mostly the problem of this manga don't care to really build up anything and just make the result of all those bad thing for the MC to fix later.
that is why stuff that make no sense keep coming up
well unlike other isekai, where the MC mostly just have pretty girls hanging around them, Ainz actually have a dependable Albedo and Demiurge to do all of the work for him, Ainz just need to stamp some paper that he has no clue what even on it.
in most of those case, the artist just did it because it looks cute, Kamitachi did a better job with this for me.
The MC is more slowly merged with his child body and sometime thought it weird why he act the way he did.
but here, the MC seem to completely natural with it.
ah yes, all those years of abuse just instantly gone just because he praise her a bit.
then again, game character, specially the heroines have always been easy to change for the route.