Hextech Key Bug in Shop

I had 164 rp left and i decided to buy a key from the shop it gave me multiple errors trying to buy the key. So i logged off and went back on and i noticed in my hextech loot i had 6 keys originally only had 0 and i also noticed i still had 164 rp. I intentionally only wanted to buy 1 key with the left overs but it gave me 6 keys??