If Abbie or JC see this, they may pass it on to Tech Support for you in lieu of filling out the form, but I think that's ultimately where this needs to go.
It looks like a bug. I think it's supposed to look just like the contact page but with the subject filled out with the name of the painting. I.e. the empty white box is where the contact message should be, not down at the bottom in the footer.
When I visited first a "buy the original" link for your site, I got the same goofed up looking page you described. When I then visited the "contact" page to compare it, the subject was still filled in with the name of the painting
