The close is 19:00, not 19:00:00.

The auto bids will be increased automatically to the lowest bid needed to outbid a previous or current bid, up to the maximum bid by that bidder. In a hotly contested auction, it will look far more confusing than this, as competing bids and auto bids will reset the bids placed and incremental times will scramble to reflect what’s happening/happened.

Auction snipe bids set up with Gixen or similar will have a time (seconds, microseconds) advantage over manual or auto bids on eBay.