sub-menu not aligning correctly

hi there,

I added a social media widget and search bar to my nav menu and finally got it to float to the right, but now the alignment of my primary nav sub menu bar is messed up, as you can see at my site: https://www.thepeacetribe.com. The one underneath about us is aligning to the left off the page, and underneath the forums tab, the submenu tab called register is aligned to the left of the log in tab. how can i fix this?