Remember when ten commandments leader meliodas was first shown, his demon mark looked very cool, almost like some weird question mark with a dot in the middle. I always liked that design the most and I couldn't wait for his demon Mark to evolve to look that way but I think it never did. After he was revived and fought fraudrin he was supposed to have the same level of power as when he was the leader of the commandments without being in assault mode form(melascula sais that herself when she traps him in the cocoon of darkness) , because rember that the ten commandments leader meliodas was not in assault mode when he was shown in that flashback. So why didn't he get the same mark even though he got the same level of power as then. So instead his demon mark looks kinda like that but it's a lot messier and the part that was supposed to be between his eyes is actually on his right eye side. Anyways, even his assault mode mark looks messier. Yes it's bigger but it doesn't look the same.

I wonder am I the only one that thinks about this? or do you think the same.