Last.fm agent not returning correct artist & more

I am having a similar problem as I’ve had previously with another artist with som additions this time. Previous issue: Last.fm agent not finding correct artist

Current issue:
I have two separate artists in my Library, one being TiA, and another being Tia. They are being grouped as one artist in my Library, I’d like to split them up into two artists if possible, but I am not able to figure out how.

Also, the last.fm agent is only returning the artist Tiga, and only Tiga as hit. See attached pictures.
It’s very frustrating when the tags clearly is Tia/TiA. I suspect it’s the same thing happening as with my Jaqueline issue previously. I can’t help but question the reasoning for using last.fm as an agent when their database seems to be a mess.

It should at the very least return this artist: https://www.last.fm/music/Tia instead of https://www.last.fm/music/Tiga

I have attached images of the tags, and the match in the agent.