Slider images all appearing at same time (not sliding) / Menu button issue

Hello, Issue #1: On my Android if I hit the browser refresh button my website Menu button stops working (it will not open to show the menu). Issue #2: Using Wen Business Pro, I am using the featured slider on my home page / front page. (website: www.cadencequalification.com). I have two images in the slider and when I am in WordPress the slider appears to work correctly. However, when I go to the website via my google chrome browser, the two images appear simultaneously on the page, they are static and the image text does not appear. This problem occurs on smart phones (Android and Apple) - the slider appears to work correctly on my desktop screen. Google's rendering function "Fetch as Google" also shows the page with both pictures simultaneously. As a test, when I add three images to the slider, all three images appear simultaneously. Please advise!!