Problem with 'Tabbed menu'

Hello

I'm trying to use the plugin 'Tabbed menu' but only works with 1 tab on the theme that I'm using (infinity, it's posted here)

As you can see, I have 2 tabs, both with categories but it only shows the category on the 1st tab.





As you can see, the 'Stuff' tab doesn't work.



Hope you understand my problem and help me.

PS: I tested the plugin on the Default theme and it's working, just doesn't on my current theme.