Um, why did you apply the fuel imbalance procedure anyway? Surely you would just secure the engine at idle and then see how the fuel burn pans out, if it looks like it is going to be a problem THEN apply the feed procedure. In any case it would appear that you have just applied the fuel imbalance procedure incorrectly, you have only turned off ONE of the wing pumps which could result in fuel from the right tank being feed to the 'bad' engine if the pressure from the one wing pump still working is superior to the wing tank pumps in the left wing. Seems to me that you ended up running the no2 and no1 engine from the right tank and ended up with the reverse imbalance to what was expected because you didn't apply the procedure correctly. Usually in the sim with a full blown engine failure I will only consider the imbalance procedure if I have a Go around or an extended diversion and will only then apply it once I see an imbalance starting to form.