I think what’s happening here is you’ve visited those links in one browser but not the other.
Unexpected things can happen when some link colors are selected and some are not. In the content section of the theme options, pick a color for the links and the hover state. Then in the navigation section, pick a color for the normal and hover states.
Since we’ve added the some css to handle the main part of the navigation (because it’s a one page site and all the pages are current pages) the navigation colors you pick should affect only these social icons. Pick both the normal and hover states.
See how that goes,
Bill