Coinbase manipulating avg cost?

Bought the only bitcoin i have at 119k & 123k, but it says my average cost is at 127k. Bitcoin hasn’t even reached 124k, let alone 127k.

Is there a reason my average cost is so high? Or is there something wrong?

I am also down 3% at the moment, so it’s not like the average cost is just a display glitch.

note: currency in usd