the computer didnt make a "mistake"..

the evaltuation is wrong but its not making any "mistakes" in its moves.

by displaying the plus score the computer just want to tell, you are escaping a big loose with two pawns behind coz you have got odd bishop lucky loser.

What am I talking about or what am I saying? Read my post if you want to know.

Which means the machine would happily jump at the chance to reach this position, possibly bypassing other dicisive lines.

u r riduculous 

Nope. Your language proficiency is ridiculous. And that's why you didn't understand what I wrote. translate.google.com

ur language skill is ridiculous,
Don't argue.
u should know how to speak
how to express ur feelings .
Don't mumble like child. 

Exactly. I remember one (high rated) votechess player advocating a very dubious, counterintuitive endgame move that no human player would give. As I checked later, it was the highest rated move.

Oh, yeah. You are right, I somehow didn't see you are talking about correspondence. Thought you mean that in general any serious player has engine for analysis after the game. I should've read more carefuly.

You are obviously right in all aspects. Also, off-topic, I'm sad that I wasn't born in pre-engine times - correspondence games were so much more interesting.

yes, i agree with u, engines r positionally dumb.
There r several positions i've found that they judge these wrongly.