Layer Slider not working in IE8 and "animated" loading

Hi !

I’ve got 2 problem with the layerslider.
I start from the easiest.
1) When I’m loading the page the content start being at the top of the page, then, when the layerslider is loaded and it appears, the content go down. This is a little bit disturbing. I see your live preview doesn’t work in this way; in your live preview the layerslider start blank when loading but it fills its content without moving the page. I hope I’ve explained it well.

The second problem is more important than the first.
I watched the website in IE8 and the layerslider doesn’t work. It desappers and it doesn’t show himself. The content of the page start from the top like there isn’t a banner. I installed the plugin respond.js and I activated it but it doesn’t work. I don’t know how it works or if I have to make some action on the code.

Can you help me please ? It’s very important and I will be gratefull to you.
It’s the first time I use enfold and I don’t know it very well.

Thanks, greetings
have a nice day

CN