Mine does too.
She absolutely hates it.
We’re in the process of changing the last name she doesn’t like by deed poll but of course we need her Sperm Donors ( i refuse to call him her dad as he walked out on us when she was 5 day old.) permission even though she hasn’t seen / spoken to him in 10 Years
I’ve managed to have her school change it on there records as I only registered her for high school with the 1 last name.
It’s such a long process, I’m hoping spermy doesn’t put up a fight to have it changed.