Why is there a price difference after I place an order on tiger brokers?

New to tiger brokers.

I bought a stock outside of trading hours using limit order at $70.90. When I finished, it shows me my position has an average value of $71.60 and a loss in floating PnL.

Where did this extra 70cents come from?
I checked my voucher and it shows me my commission fee voucher was used so I doubt it's from there.

Is my position not fulfilled yet cause it's still in in the position tab and not under orders?