Drunk Chess

Why was stockfish level 3 playing such strange moves here: http://en.lichess.org/ILmpQe28Yd5F

It gave away pawns early in the game, then hung a piece. I won easily.

But what is the reason for such strange play?

Hello friend, it seems that this thing just happens with us, by now, nobody told a word.

http://en.lichess.org/TlvinPHp6Ran

Stockfish Level 6(!) blundered a winning rook-and-pawn endgame into a loss against me.
@thibault: Could you please take a look at this? Thank you.