Why is getting baptised twice wrong?
Because it’s not possible to be baptized twice. There is one baptism for the forgiveness of sins.
Its not wrong, It just cant happen. Baptism places an indelible(irremovable) mark on your soul. You get one mark not two or any other number. Once its there its there to stay. Likewise baptism completely cleans your soul from sin. That happens once. I hope I helped.