Create Orders

I am building a site for selling T-shirts online. I have a sales team which will take care of the sales offline. But however I want those sales to be added as orders in the site, so I have a single point of reference for all the orders.

I created a role called 'Sales team' and set the permissions appropriately for them to add offline orders to the site. But however I am facing few issues.

1. When creating an order first I have a message "No line items found" and an option saying "Add line Item". Once I click on the "Add line Item" I get options to add the products. Why is it so?

2. When adding the product or line item, I am not able to edit the value of the attributes. In my case the attributes are Size and Color. If I cannot add them while I am creating an order, it doesn't help me much.

3. Last and important feature I want : When creating an order in the site for the offline sales, I want it to be associated with a mail id. So that when the user actually creates an account on the site and uses the mail, the order can be associated to him.
   I mean the account information is not being captured. The flow needs to be the way it is for checkout now.

Please let me know how I can achieve the above

Thanks in advance.
Gokul N K