The 2.160 battlepoints issue has been fixed. Here's the new behaviour description:
Battle point calculations were adjusted to make attacks on friendly units less attractive to farm battle points.
Successful defeat of units in the players posession generates 0 battle points.
Defeated alliance members' units generate 20% of the total possible battle points for all units killed. In case of this resulting in decimal numbers, battle points get rounded.
Battle reports will display an info icon with more information on the specifics: