Fonts and Nav Bar Display Issues after using HummingBird

My website started having font display issues as well as navigation display issues after I installed and used HummingBird. The nav bar used to be black in color, now it is blue. Also, you can see that once your mouse over the menu, the drop down menu for sub category is not clear anymore. And at the footer, text are all grayed out and a logo that should not be there is now there. See these screenshots: