Limited time items
The wings will be back. It was stated they were a preview item.
As for the blade wings, you crafted a L80 item. It clearly states that in the description so of course you have to be L80. Unless you are talking about the twin or quad blade wings which are level 40 and 60 respectively. Also in the description.
The Burninator
(edited by JustTrogdor.7892)
Don’t worry, the wings were on a one-day preview. Anet’s stated they’ll be back, and I reckon they’ll be back soon. As for levelling, its really quite fast in this game so don’t worry too much about it. Just explore maps, do quests, and focus on your personal story ^^