That's why, it's too high, she should be 250 at the point you're at.
she only gains 310 at the end of 0.21. and because, as I'm suspecting you increased her points artificially, it bypassed the trigger. which from my experience would not be fixed if you where to roll it back using the cheat. you would have to either start over or from a previous save.
or, what I would recommend, is to download my "Completes 0.20" save from the link in my signature and start from the beginning of 0.21.
Regarding relationship points I posted this a few days back
https://f95zone.to/threads/the-twist-v0-37-final-cracked-kst.1282/page-1171#post-3130543