Hello Naquiyah Cash,
Please review this document and associated articles: Why Your Grand Total or Subtotal Isn't Working as Expected
This will cover the whys of what is going on.
The attached workbook utilizes Table Calculations for each of the measures and a copy of the the field Owner Department for each of the fields to reference as the level to compute at. I hope this helps out. If you have any questions, please ask away. The grand total issue is a fairly common question/misunderstanding of how Tableau works.