Hide/Unhide Sheets based on drop down list

Nope, still doesn't work. Only works fine if I select "All Divisions". When I select "Financial" it hides and "Region FIN" but it should be visible.
Also if I select case "Financial" and then "Retail" nothing happens.
I can't figure out on which principle this code works, I mean, how it's know which Sheets to hide?
What if I add some new sheets?