Check-out buttons glitch

My Woocommerce settings are now on: One page checkout.
But my forms are now below each other.
When I turn off the One Page Checkout setting, the fill in forms change to be next to each other (which is what I want) but two buttons appear out of now where that I don’t want because they don’t belong and look really ugly.
So what do I want:
I want a one page checkout but my fill in forms have to be next to each other instead of beneath each other.
Does anyone know if I can change that and how?

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