That's a misapplication of the passage. You can no more imply a spherical earth from that passage that you can imply that the Coming of the Kingdom of God will occur at night, or that there are two people in every bed.
That is not a misapplication. It says that it is going to be night for one person, and day for the other, at the same time. That certainly shows scientific accuracy: no way this truth could have been known!
Again, I am baffled by the way you are trying to portray the Bible is scientifically inaccurate. This truly astounds me: if you trust Christ, who quoted the Old Testament as fact, what ON EARTH could be your agenda?