There were no bids placed for Karp 2 in the last 15 minutes of the auction, so the auction for it did not get extended like it did for the other two, so your bid that landed at 3:51 was just 1 minute late.
The winning bid for 2nd Karp is 200k by @Wiiiiiii, as it was the last bid made during the valid timeframe (ended 3:50). You can pm in-game to pick up the pokemon.