cross-browser (Mac vs PC) compatibility problem – links not showing for Mac

Hello everyone, I’m having a problem with my site where I added a new page and corresponding link to the menu. Everything is working nicely except that the link isn’t showing up in when using Chrome on a Mac, also some of the formatting is a bit wonky in IE on a PC.

I know that cross-browser compatibility is especially tricky these days with all of the different options available but was hoping that someone could offer some advice.

I’m using a customized theme, the site is https://www.trademarkshop.ca. The “fees” link is the one I’m having trouble with.