Bob Copper always said
"take the song and make it your own"
Sounds like this lass has done just that. This doesn't mean that you have to like it or start singing her version.
Folk and good songs can stand some minor alterations or complete parodies and still be good songs in their own right.
There is no right or wrong in this her version is just different. Accept it and don't let it upset you, you can't make her change what she's doing, so don't raise your blood pressure over it just agree to differ with her.