I'm experiencing this too. I create a new Delivery with my Amazon credentials and it doesn't matter what I type in the Order ID field; it picks everything "active" in my Amazon orders; even a couple of orders that were delivered more than a month ago.
This is undesireable because now in the main window I only have 1 item with 0D ETA (the "bundled" Amazon orders) and I have to tap it and browse tabs #1, #2, ..., #N to figure out which ones are really expected for delivery soon.