You have to nopepper, or the Kickstarter might fail its target goal... What you give privately cannot be counted by the Kickstarter system... That's how it goes. Also sucks, but you'll have to pull out a credit card as Paypal is not supported for some reason...
Advice: Log in with Facebook, let it create your account that way, back it with a CC (uncheck the box to save your number for other projects), wait till it's over if it succeeds, then after your CC is charged and you know for sure, go to your account settings and completely delete your account (it allows complete deletion). Again, *WAIT* till this is all over and you see the charge on your online CC billing before deleting the account!
This is the only way if you want your backing/investing to get the project over the finish line (it could still make it without you, but every person is critical right now and counts as backing has slowed down!).