PayPal option doesn't go away

Hi:

here's the site: http://few.modernmediajapan.com/events/2012/02/foodies-and-food-culture-few-feb-meeting/
screenshot is attached.

I don't have PayPal enabled in the plugin, yet the PayPal option shows up when someone clicks Maybe or No, whether they're logged in or not, despite not being checked,

How do I fix this?

Thanks,
Terri