dear chintan, since u sold today, you will get 40shares less 4 shares ie 36 shares credited in your account on 21st of May.You have sold 4 shares of face value Rs1/- and not the original face value Rs10/-.Even if you have made a mistake,NSE terminal will itself reject such low price.You cannot place a sell order for Rs65/-, when the share is Rs650/-.It will reject as out of range.so dont worry !!!.Cheers!!!.Have a drink(if u do) and enjoy.
bye
ravi