[mario]

The first one, 170142507090, your bid is 27.38, and the winning bid is 27.50. The second one, 170142879665, your bid 27.99, and the winning bid is 27.50.

In the first case, your bid is clearly lower than the current bid, so ebay would not accept it. In the second auction, your bid is lower than the current bid + bid increment, so your bid was again under ebay asking price at the time.