I wish Right Stuf store's shopping bag would keep items for more than a given day! Sometimes I shop for items and I'll want to maybe push off actually ordering them until I'm completely ready & am not still perhaps going to toss more atop the same s/h charge.
Like others said, that's what the "save for later" section in you cart is for. The reason why the carts time out is because of the counters. When you put an item in your cart, it removes the item from the actual inventory/stock. When the cart times out, the item goes back into the inventory.
Note: The "save for later" section is Right Stuf's version of a wish list. Putting an item in there doesn't remove the item from the inventory.
This will be most noticeable on Bargain Bin items that contain counters. Put one of those items in your cart and the counter goes down by one. Remove the item out of your cart and the item goes back up by one.
I also wish that it were easy to look at all incomplete /unavailable /preorder separate orders in a fashion that would allow one to combine and adjust orders with ease.
I'm assuming that you're talking about the online order status? Just click on the "archive order" button on the "shipped complete" orders. This will hide them and all you will have left in view is the open orders. If you want to see any of those complete orders again, simply click on the "view all your orders" link.