Menu is not displaying properly.

Question

Hi team,

 

 I have created menu in my project.But while painting I have faced some issue.If you run the attached sample file and

1)When click on Test-->Functions dropdown(sub menu) list is populated and when hover on Parent,Parent1 and Parent2 another submenu show but it will overlap on each other.

2)When click on TEST1-->Functions dropdown(sub menu) list is populated it will not display properly.

 

So please let me know how can I resolve the issue so that my menu work properly.