From: Pittsburgh, PA
Unfortunately, yes. This was definitely a design flaw on our part. The hearts only show up under an artist's name bar in the description for an individual art item, and when you're looking directly at an artist's portfolio, it was assumed that you already knew whose art you were looking at, so the name bar doesn't show up in the description, thus no heart and no way to fave.
Get out of the vacuum and express yourself!