The tableau Screen Format

Hey all
I have just started my course tableau for beginners. I am having the following two issues:

  1. On the screen, i dont have the headings for dimensions and Measures. All variables are just listed in one list.
  2. I dont see auto generated field called Number of Records?

First i downloaded the Tablue Public and had this issue. Then i downloaded Tableau for Desktop but the issue remains. Please advise