Yes, it does change his mind "later", but this is of no use- damage already done. Going 40-ply from the diagram position is obviously going to take a couple of weeks, even in fairly modern hardware- so impractical, even for correspondence chess.
The above position happened when I, as Black, opened the h-file prematurely (Black had a pawn on h5 and white on h2, plus one more rook each), where Black should eventually come out with a winning plan. But I also committed the very same error: I trusted the engine evaluations, without realizing the fortress plan. It was only when the 5-6 "best" lines all came to the very same evaluation (very favorable to Black) when I realized that there was something wrong, white could set up an inpenetrable position, and Houdini/Critter/pfren had in reality blundered half a point...
Which position? I must have missed it.
The rating is theoretically 3300 ELO.
The rating largerly depends on the software and the amount of time the software takes to process.