We deploy Studio theme and found a bug at Sub link on a Top

We deploy Studio theme and found a bug at Sub link on a Top menu. Please looking a picture on below.
Picture link:
https://drive.google.com/file/d/0B6DjElIgPNa2SUJ0Vkl0V1NiWW8/edit?usp=sharing
https://drive.google.com/file/d/0B6DjElIgPNa2WDgyZlMxd3lxeGc/edit?usp=sharing

Please send a solution to fix this bug at phodcharak@nist.ac.th