[Avodah] Parshat Ki Tavo: What Was Written on the Stones?

[Prof. Levine via Avodah]

According to some the entire Torah was written on these 
stones.  However,  others disagree.

Please see the article at

http://tinyurl.com/yblaj8cu

If as some hold that the entire Torah was translated into 70 
languages,  then why was it necessary for Alexander to gather 70 
sages to translate it into Greek.  Didn't there already exist a Greek 
translation?

YL