on the thread it says "Only new pixels allowed."

I'd take that to mean that you can't use something you've made before the contest

pretty nice concept tho

First of all I never submitted my other heart to a contest. Secondly I edited it for this contest. I really did not read a thing that says you can not edit your own art for a contest.

Yep, he's right, you can't use stuff that you've previously made in a weekly challenge entry. It's simply not fair.

You already have that heart in your gallery. This really isn't a new piece...