This has been an ongoing issue ever since shops (like the Quest shop) were revamped to have a tab style. The tabs make some of the links in the dropdowns unclickable.
For example, in the VIP shop, I am unable to click on "Your Shops" under "commerce" and "Suggesions" under "interact".
In the Cash shop, the tabs overlap the dropdown menus: [IMG]http://i.imgur.com/Y4M5IHV.png[/IMG]