Ahh, if that's the case, then that's fair enough - Honest mistake. I'll hide my comment on Ptro's profile, since you didn't mean any harm. Just so you know, deviantArt isn't one of those places like tumblr or Twitter where you "share" artwork by featuring it on your account (unless you have the original artist's permission and credit them in the image description, which a few people do, but it's not very common.)
Thank you for understanding and taking the art down. Art thieves are an unfortunately common problem here, so I try to call 'em out when I see 'em. All in all, no harm done this time, right? Lol
Good luck on your comic! Just keep practicing, and you'll be surprised how amazing your own art can become over the years!