Cart issues

[teralite]

Hi!

 

I'm rebuildning my cart in a new theme, but i get some problems i cant find the solution on.

 

website is www.teralite(dot)se

 

1. When i add a product to the cart, the name produkt or produkter dissapears, but is back when i refresh the site.

 

2. When i add a product to the cart, i added a line that collapses the cart again, but the a new "summary" appears, and i cant see the cart again if i press the "show cart". Same here, works again after refresh.

 

3. When i go to checkout page, the cart cuts by the header if expanded.

 

For login if you want to check, please use [email protected] / test1234

 

Thanks for any help!