The task switcher settings page doesn't require you to click "Apply" when modifying a keyword and clicking "Reset" doesn't revert back the shortcut, also the names for those same settings don't reflect the shortcuts found in the "Shortcuts" tab.
My suggestion would be to remove entierly the option to modify shortcuts in that page and make a button that takes you directly to the shortcut in the settings. In the case this isn't possible at least it should ask confirmation for applying changes and make possible to revert the changes.
This would make the settings app more coherent because i don't think there is another place, other than the designated "Shortcuts" page, to change any Shortcut.
*** This bug has been marked as a duplicate of bug 459325 ***