Few problems with vendors and orders

-- HikaShop version -- : 2.4.0
-- HikaMarket version -- : 1.6.2
-- Joomla version -- : 3.4.1
-- PHP version -- : 5.4.36
-- Browser(s) name and version -- : Firefox
-- Error-message(debug-mod must be tuned on) -- : n/a

Hello,

Plese confirm/infirm the following issues with the latest HikaMarket version:

1. the filter for the payment methods is shifted to the right (see attached image)
2. the vendor can not open pop-up for email and invoice. Div seems to load, but then it locks.
3. the category selected by the vendor when add a new product is not saved, so the super user didn't know which category has been chosen by the vendor.
4. Strange: the order number is different for vendor and for client/admin. For example, the order number for client and admin is F5, but the vendor have the number G6. The rest of the values are correct, except the order number.
5. When user finish the checkout procces: "Warning: Invalid argument supplied for foreach() in ../administrator/components/com_hikamarket/classes/order.php on line 1930"

And another issue, but this might not be related with hikamarket:
- the checkout process does not require the billing/invoice address, but those areas are still visible in the order email and into the client order details. What file(s) do i have to edit to hide those areas?

Thank you