Sorry guys, the commenting system that comes with Sandvox is really quite weak. I guess it makes sense as it's very much a super-easy visual site builder aimed at beginners. Please just use the support page to e-mail me.
Also, the only reason I turned on comments was to get some sort of discussion going. However, pretty much all the comments are just direct questions for me, which are better served via direct e-mail.
Someday when I decide to forgo the visual editor aspect of Sandvox (or similar products) and jump to Wordpress, we'll turn commenting back on.