Hi I think I found a bug, below shown the resources of a rival of mine before I attacked him.
Resources 844 671 metal
968 639 minerals
296 799 Vespene
15 704 energy
BATU got 164 844 metal 189 010 mineral 57 921 Vespene this is what I got after the battle;
The losses while robbing were 61% from 422 679 metal, 484 643 mineral, 148 517 Vespene ( these resources are 50% of all efore the battle.. so far so good) BUT;
424 883 metal
486 735 minerals
149 287 Vespene
15 704 energy IS THE ESPIONAGE REPORT JUST AFTER THE BATTLE. IT SHOULD BE
844 671 metal - 164 844 = 679 827
968 639 minerals - 189 010 = 779 629
296 799 Vespene - 57 921 = 238 878
so this is a bug or not?