From what I can see, in order to utilize the drop down menus you have to indent those pages under a main page in the custom menus settings. If possible I would just un-indent them and that should remove the dropdown.
At least that is how I understand the issue, forgive me if I misunderstood you. Hope it works, have a nice day!
This person seemed to have your exact same problem and has come up with a solution. She laid it all out in steps too, which is always nice 🙂
Here is the link:
http://melissa-burns-photography.com/2011/09/22/does-your-image-change-color-when-its-uploaded-to-the-web/
Hope that works for you as well, have a nice day!
