Bogus Contract

This is my employment contract with Chatrwittaya School.  I don't see my signature on here so maybe this is just the first page.  I never got a copy of it.  I wasn't even told it was my employment contract.  I was told to sign some paperwork for my visa.  That's all.  I can't read Thai but my girlfriend read it.  Near the bottom you can see it says 15,000 baht, that's the monthly salary.  The agreement in my email with Mrs. Rosjan was 36,000 baht, but she decided to put 15,000 in my contract.  I don't know if this was intentional.  It seems to me that Mrs. Rosjan doesn't know what she's doing most of the time.  She does not think things through.  So it's possible she just has a employment contact template that she uses with everybody who works at the school, and just inserts the appropriate name into the contract.  She never thinks "Oh, maybe I should translate this to English for my foreign teachers or actually insert the correct salary."