Why Lichess says that i use an engine??

this is 100% cheating http://en.lichess.org/qTxAZa0a/black

more cheating
http://en.lichess.org/HzOaqZqS/black#54
http://en.lichess.org/zYmYOuBz/black

flat line but one move http://en.lichess.org/Ir9sLBes/black

flat line, maybe he decided to play Kxf2 without engine assistance
http://en.lichess.org/DnIltca0#41

Right now I do agree. There were some unhuman moves in it.

if the engine detector flags u as a cheater, then u r a cheater. sry

Let's... stop beating a dead horse.