Having trouble getting buttons in menu header to work

The site I’m working on is

For some reason, all the buttons work except “get involved” and “patterns” which, no matter what I do, I can’t get to change. Also, I can’t seem to get the “skin” of the header to not loop, and I can’t get the ribbon rollover correct. Anyone willing to help? I’ve been staring at it for hours to no avail. Thanks!