Nice art, clumsy frame

I am mostly happy with this art. They look pretty much as expected, but each canvas has eight of these little plastic wedge pieces in the back that fall out repeatedly. It appears they are necessary to keep the canvas stretched properly (mine had all fallen out in the box so my canvas' were loose and had some wrinkles until I put them back in. Some were missing entirely.) I've never seen this before and don't have it on any other art in my house and it's kind of annoying.