Slider Problems

I’ve removed all the images, text and button text from the customizer, but for some reason, the changes only show in the browser I’m currently in. All other browsers continue to the the stock images and text.

In addition, my menu isn’t set. However, if I click on the “create your menu here” link, it brings me to the 404 page, and it shows all the proper customizations. It’s just the front page apparently.

Any help?