If I want to see the bidding activity in AW2000, I update my auction lots even before the auction end. And then I sort the Lots by close Date. To do that , go to the Grid view, scroll over and hit the Close Date bold black header. Then everything ending tonight will all be sorted together.
After all the Auctions have come ended, update all Auction lots, Generate Invoices and you are good to go. You can request buyer information or send the Combined invoice, whatever it is you need or want to do.
If a buyer wins more than one auction, you can merge them together. How you handle and find repeat buyers is completely up to you. Seller's handle their repeat buyers differently.
What we do is request the buyer's name and address. If you have the name and address in AW2000, the next time you generate Invoices, and that person wins something, their information will automatically appear. Makes it easy to spot because the Invoice status is "Buyer Not Contacted" but there is a name and shipping address already there. So you will know that person has won something from you before.
When we see the name and address already in a newly generated Invoice, we go to (on the menu bar) "Invoice | Merge Invoice". If the buyer has an existing Invoice, it will appear in the Merge Invoice dialog box. And we can group the two Invoices together.
You cannot use the User Id as a search option before bidding is closed. That field is for after the Auctions have closed and the User id is stored in the Buyer button in the Auction lots window. Prior to that the User id is simply bidding activity stored in the Bid History.
You might consider adding a footer to your Listing template containing information concerning how you handle combined shipping. Something as simple as please email me if you wish to group items together to save money on shipping. It does not need to be elaborate. But your buyer's need to know what to do and how to do it.
I hope that helps some.