Some problems on my web page on INTERNET EXPLORER and not on other browsers

Can someone help me please?

Am working on this page:

http://www.lorealprofessionnel.co.uk/about-us/loreal-professionnel-portfolio

On INTERNET EXPLORER, why I can't see arrows to navigate through the carousel. It works on开发者_如何学C all others browsers

I have put :

<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE[all version here]" />

but nothing !

Actually those elements appear and disappear on Chrome too. When they're invisibile it seems something has given them explicit positions which are fighting with the logic in the original CSS. I can't find where precisely quickly because the page loads over 20 JavaScript files. I have rarely seen so much code to do so little. Screams of corporate CMS. I'm not surprised debugging this is a nightmare.