You probably planted it rightside up, and the new growth is a keikei at the
top of the bulb instead of a new growth from the base. It's pretty obvious
which end is up, it will be pointy at the top of the bulb, the bottom of the
bulb will have a wound where it used to be attached to the rest of the
plant. I would lay the bulb on its side on top of the mix. Don't water it
much until the new roots are reaching down into the mix.
-danny