I just found that I gave a wrong unrelated work experience date, but it doesn't affect any point that i claimed, so I did change the date on my application.
and after I checked Mr. MysticRiver's post, It should not affect my visa.
Should I mention this mistake on my Form 80 and...
Have you seen the new statistics page we have introduced? Check out this link and keep an eye on the Statistics section for new modules to be added in near future!