No.1 - The Fact is 1.5 billion muslims have not subscribed to Elakiri to read your post;
No.2 - Most Muslims in SL are actually not learned of their religion; but this does not make any religion less accurate or impractical... these are problems with the concerned individuals just like me and you.
No. 3- tell me that you found that contradiction all by yourself and not picked it up in an anti-islamic site..... If you had knowledge to find contradictions like that then you have to be a very learned person in Quran....
Answer - Quran is revealed in which language? you are reading a translation of it.. which may not be 100% correct iteration of the original, Agree?
the word "then" is what is bothering you - read further
The word "sky / Heaven" which you said is meant as a roof has rather different meaning -
According to Quran, and as agreed by science (which is discovery of God's creation anyway) these are atmospheric layers:
1. Troposphere; 2. Stratosphere; 3. Mesosphere; 4. Thermosphere; 5. Exosphere; 6. Ionosphere; 7. Magnetosphere
I'll help you with a link to an Article which can detail you more...
http://www.miraclesofthequran.com/scientific_19.html
Al-Quran 2:256 - Let there be no compulsion in religion. Truth stands out clear from Error; whoever rejects Evil and believes in Allah hath grasped the most trustworthy hand-hold, that never breaks. And Allah heareth and knoweth all things. (256)
Hope this helps you with the grace of the superior energy which created you and me
Puhul hora karen Dane kiwwe kata kahanawata neweiney.. 
