Hi,
I was able to reproduce the problem with the product deletion on the cart page display. I've fixed it but it required modifications in 6 different files.
As it's not practical to give all that in a post, I can provide a full install zip of a pre version of next version of HikaShop, if you request it via our contact form (in that case, please give a link to this post and your HikaShop order number), or you can wait for next version of HikaShop for the fix (should be available before the end of the month).