Some advice; If you are getting weird jagged edges on some of your gens, that would be due to using webp images (cookie run official website uses them) as I'm guessing that's where you got some of your dataset. Make sure to change it into png format otherwise it will have invisible layers, which I believe cause this. Otherwise, very cute lora!

Oh, for the tie issue, you have her costume tagged as 'shirt' I see, and it's good to keep the tags simple. Though, too simple and the text encoder will look at it and well, encode it as a shirt and most shirts I know don't have a tie attached to it. So it's probably trying to make it like part of the 'shirt' design. Perhaps if you used 'conductor outfit' instead of shirt, that could work better.