The "Kettle Helmet" doesn't sit on your head. I can see the head and the helmet floats one meter in front of it. Sorry i didn't think of taking a screenshot.
Edit (2015 02 28) : Nordic Pot Helmet, Mail Coif, Padded Coif have the same issue (incorrect helmet position)
Edit 2015 03 08 : It seems these particular helmets have been fixed. The colored skull caps still look like an arrow though.