[✔] Rune Bug - Can't buy anymore runes

Hey, I've encountered an extremely annoying bug with runes.

As you can see here I'm trying to get a full stack of runes of this type. As shown I only have 2 of this specific type, and when trying to buy one more, I get an error message saying I'm trying to buy more than the max.

Currently I cannot buy any runes at all. Even if I have no runes of a certain type, trying to buy one gives me this message.

Some things to note, I have most of the lvl 2 runes; I can't buy anymore of them either, and this bug only occurred after I bought them.

I'm inclined to think Riot has implemented a max amount of runes that an account can have (probably equal to the number of lvl 3 runes); since I have most of the lvl 2 with the majority of the lvl 3 I'm hitting this cap.

The new client doesn't offer a method to get rid of runes, so I have no idea what to do. Someone halp