Presentation Page "Store Pages" broken/ JS errors

Hi there,

Yet MORE bugs with the new MarketPress.

The "Presentation" options panel throws a JS error in my console, blocking other JS functionality (WP dashboard sidebar menu hovers, etc):

Option 'multiple' is not allowed for Select2 when attached to a <select> element.

Also, the "Store Pages" dropdown boxes are all empty, showing no existing pages. Clicking "create page" creates a page, but the dropdowns are still blank.