Art World Online

When clicking on Top Horizontal Menu while using mobile device the menu appears then disappears and is generally unresponsive. My prestashop is V 1.6.1.20 Website: www.artworldonline.co.uk

Hello, I am trying to assign images to the a product range that consists of 60 odd different colours. However, although I have selected the appropriate image within the combinations area when I check in the preview to see if this has worked the last five images are not showing. It's as if I have not selected an image at all. They are no different from the first 50 odd and so I am unsure why this would be? Any ideas? Thanking you in advance Donna