Character of the Seme

I have the feeling the author just didn't know what to do with the seme.
It feels like they tried to deepen the plot and make his character more interesting but failed miserably at connecting the given information. There are so many holes. The whole vibe doesn't fit anymore. You really notice when the author changes their mind about the character again:

First stage: The loyal and nice Seme. The Seme who likes SM and likes the Uke and secretly was always in love with him. Uke seemed like a crush to him.

Second stage: Author tried to make the Seme darker. The Seme who lost interest as soon as they met again and then just wanted to use the Uke and dump him. Uke seemed completely worthless and boring to him when they met again.

Third stage: The poor fake heir who always liked the Uke who didn't like him and just doesn't want to admit it but in truth he always liked him. Seme had only precious thoughts about Uke when they met again and it seems like they also tried to make the Uke look more "cold".

The information and the way it was drawn really doesn't match up. I think you often are able to notice when an author wants to change up the character or improvises to create more drama but I have never seen a severe case like this. Maybe it's a translation issue? But even the art doesn't match up. I think you can notice how the author tries to connect everything and I hope they will succeed.
I like the story in itself but all in all it just feels like the storyline wasn't thought through at all and they are just deciding on a whim what they should do now, without a regard to what they have already written or they are just glossing over it.