Hey Rationalizer,
let me tell you where i think that the "spread out earth" comes from.
As we know, muhammad had a lot of contact with jews, so what we can do is to investigate the jewish creation story first ;-). You find it in the bible, right at the beginning of the first book.
By that story, there was first water and gods spirit was hovering above the water. Then god separated it into heaven and earth.
1 In the beginning God created the heaven and the earth.
2 And the earth was without form, and void; and darkness was upon the face of the deep. And the Spirit of God moved upon the face of the waters.
3 And God said, Let there be light: and there was light.
4 And God saw the light, that it was good: and God divided the light from the darkness.
5 And God called the light Day, and the darkness he called Night. And the evening and the morning were the first day.
6 And God said, Let there be a firmament in the midst of the waters, and let it divide the waters from the waters.
7 And God made the firmament, and divided the waters which were under the firmament from the waters which were above the firmament: and it was so
Afterwards the term "earth" appears a second time:
9 And God said, Let the waters under the heaven be gathered together unto one place, and let the dry land appear: and it was so.
10 And God called the dry land Earth;
So what we see here is that - by that story - the word "earth" is actually used for the dry land which appears when the waters gather on certain places. Of course this has nothing to do with our concept of a round earth as we have it today.
Now lets go to the quran: Muhammad copied a lot of those stories from the jews - and he describes the earth in contradictory verses: One time,
"earth and heaven" have been separated at the beginning. In another verse, the earth was created first, and then the heavens - and in another verse, the heavens were created and then the earth was "spread out".
All this makes a lot of sense if you think about the word "earth" in the context of the previous scriptures: "Earth" is first used as complement to "heaven" and later as the dry earth, which could be "spread out" on the waters.
What do you think of that?
UG