I Have 11 of the Same Rune...

So... As you can see, by the cursor, I have 11 Greater Seals of Attack Speed. I don't know how exactly this happened, but when i was searching for runes to use for , the store wouldn't process my request to buy 2 Greater Seals of Attack Speed, so I did it a second time, and it still didn't work. Then I looked in my runes, and they they were. When i logged in the next day, I learned that I had only been charged the IP for 2 runes, and now have 2 extra.