How does Ebay multiple-item bidding work?

How does Ebay multiple-item bidding work?

I have copied Ebay's "Help" screen on this topic and I still don't get it. Read it below, then read my questions and try to help me, please. Thanks.

General Tsao
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When you see a quantity of two or more on an eBay auction, that's a Multiple Item Auction (Dutch Auction). This means the seller is offering multiple, identical items for sale. Unlike a regular eBay auction, Multiple Item Auctions can have many winners.


When you bid on a Multiple Item Auction, you specify the number of items you're interested in and the price you're willing to pay. All winning bidders will pay the same price: the lowest successful bid.

For multiple item auction listings, you cannot enter a maximum bid. The amount of your bid is the price you pay, (if yours is the winning bid). For example, if there are 10 items available and the opening bid is $4, and there is one bidder who bids $20 for 10 items, that bidder pays $20 for each item.

Much of the time, all buyers pay the starting price in Multiple Item Auctions. However, if there are more bids than items, the items will go to earliest successful bids.

To beat another bid, yours must have a higher total bid per item than other bids, regardless of how many items you are bidding on. Reducing this total bid value in subsequent bids is not permitted.

Example: For a listing with 10 available items and 2 bidders:
Bidder A bid for 3 items at $5 each.
Bidder B bid for 8 items at $6 each.
In this case, the lowest successful bid is $5. So the outcome of this listing is:
Bidder B wins 8 items at $5 each.
Bidder A wins 2 items at $5 each.

Winning bidders have the right to refuse partial quantities. This means that if you win some, but not all, of the quantity you bid for, you don't have to buy any of them. In the above example, Bidder A bid on 3 items but won only 2 of them. Bidder A can refuse to complete the purchase, as he or she didn't win the quantity they bid on.

Successful bids are displayed when you click on the link reading, "see winning bidders list" link. The complete bidding history (including any unsuccessful bids) is displayed when you click on the 'bid history' link.

You have the right to refuse partial quantities. This means, for example, that if you bid for 10 items and are offered only eight when the auction ends, you don't have to buy any of them.
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So, what I don't get is why Bidder A was the "Lowest successful bid" but Bidder B got all eight of his items while Bidder A only got two.

If Bidder A was the successful bidder, then why did he not get all three items?

Also, why wasn't Bidder B, who bid $6 per item, not the successful bidder?

Thanks for your help.