So I just got the ancient shrouded armor from hags end for the dark brother hood (that hag raven was a [censored] lol) and noticed that when i tried to wear the Ancient shrouded cowl it didn't appear on my head ( my argonians horns did disapear like i was wearing it though.). so i switched back from the shrouded cowl and then to the ancient one and it still wasn't working. but then i noticed that the ancient shrouded cowl and the shrouded could both be equipped at the same time and their effects were even stacked. now i am by no means complaining as this is quite a pleasant bug for me lol, but i was just wonderin if any one else has had this and how often it happens.

Wiki Bugs

• There is an error in loading its texture, and the game will allow the player to equip some certain second head armor such as http://elderscrolls.wikia.com/wiki/Dragon_Priest_Mask, combining both armors' enchantments and armor ratings. This is verified to work with the Falmer Helmet and circlet combo for a total of three head pieces. (360)
  
• When worn by Khajjit, Dunmer and Argonians, cowl is not visable and removes hair style. This has also been confirmed for Imperials. Apparently, this will also remove the cowl's armor rating from your character. (PS3,PC,360) To at least gain the cowl's effect if this applies to one, he or she must wear a Dragon Priest Mask or perform a Falmer Helmet/circelt combo. (360)

Sounds a bit strange to me!