Please provide precise and specified information.
At last, what's problem? What information did they see? Where is the difference?
Do they see from Tableau Desktop or Tableau Reader?
What are the versions, including the Tableau Desktop you used to create workbooks, the workbooks saved by you, and the Tableau Desktop or Reader used by someone else?
no, when you save your workbook with latest data and share to some one then they can see at the time of data you saved in twbx. if you want to update then open in tableau desktop and update and share new one daily.