always receive "Items on your watchlist are on sale!" email, but i already owned them.

as title.

email content ---------------------

Hi,

Items on your watchlist are on sale for today only! View them at https://www.pathofexile.com/shop/watchlist


Item: Gore Lightning Arrow Effect
Original Price: 75 coins
Sale Price: 50 coins


You can change how you receive watchlist notifications at https://www.pathofexile.com/my-account/preferences

Kind regards,
Grinding Gear Games
https://www.pathofexile.com/

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I already bought the "Gore Lightning Arrow Effect" long time ago and it's not in my watlist, it keeps email to me everytime when discount.