Fundraising Panel

Well,

I've installed Fundraising using default configurations. For some reason that I don't know, on the Ammount options, panel show two options ( "$0" and "none") that I can find where to disable.

The Second question its: The "back this project" button its on top of the options and bellow the custom Amount.
How can I disable the custom amount (without losing custom reward) and but the "back this project" button bellow the amount options?