I think maybe the OP is just as confused as I was when the MagicBands were first introduced. Nothing is linked to the BAND. It's all in your My Disney Experience account. If you have all that set up, then your BAND is fine. So, as a PP, put your tickets into the My Disney Experience account and all will be good.
The BAND just is a chip that reads your My Disney Experience account information. But it looks nice and does a heck of a lot.