No, you are just not seeing yet what the "real" iPhone 8 will look like. The position of the current time will be sorted out when you first see an actual iPhone 8.
All you can see now is some rumored change in the shape of the screen, which may not be what is released as a real iPhone.
If the physical screen does not allow the time in the normal position, then it will either be missing (and not full time on the screen, or it will be in a different location. (Why would the time need to always be in the top middle position?
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)
Be patient, it will all work out!