We've tested the site in all browsers and for some reason, we are having issues with the Google map section on the homepage, but only in Chrome on a Mac. The developer who created that section of the site does not have a Mac and is unable to test and recreate this problem. Everything looks to be fine, but I can't seem to find the solution.
The site is here.
Screenshot of the problem is here. The maps should not be overlapping, obviously.