Problems with theme

Hello,

thank you. Only this problem with stock...i dont understand:) I will ask here, maybe you or other coustomers can help me....

for example takes this product:

http://www.cityshop.si/dodatki-za-dom/15-retro-tus-rocka.html

On front page, you can see that you cant add this product in cart.

BUT in administration page, i set 10 quantites for this product.

Screen shot: http://shrani.si/f/2x/qp/2DU3cZcK/brez-naslova.jpg

What is the solution?