Paypal and wepay questions

I’ve been trying to ask this over email since it involves some private data but getting no response so I will try here. I currently have a site built on this theme that is almost finished. Here are my questions:

1) I was told by someone who is more familiar with WP and crowdfunding that the only way to set up a site on this theme with both “keep it all” and “all or nothing” funding systems is to have more than one payment processor such as paypal and wepay. Is this true for current version?

2) Where can i find info on how the “keep it all” instant payments work and how the project creator gets paid?

3) My developer was having a lot of trouble installing paypal (which brings up # 1: are both processors needed) and the latest error thats showing is this:

<b>Fatal error</b>: Cannot access protected property Error::$message in <b>/home/jarweg/sitename.com/wp-content/themes/funding_press/funding/lib/PayPal/Serializer/Unserializer.php</b> on line <b>826</b><br />

Can you elaborate on this error? How can it be fixed?

4) Can you take a look at my paypal to see if it was correctly set up with the theme?

Thanks