Only one payment not selecting auto?

[peaceandlove]

check our site http://phatwater.com.au/pw

we had only one payment mehtond, and i want to select it auto, I had enable

Enable Automatic Selected Shipment?   
Enable Automatic Selected Payment?

to yes, but only shipping is auto select? not payment, i checked out (not selected) one page check out?

Why payment is not selecting auto