Kills mobs there were assigned other players

When i am in a area where although other player active (i am in no group) WRobot target mobs there where assigned to other player. The battle from WRobot is really stange. Here the battlelog from WRobot:

[D] 14:01:34.548 - [Fight] Fight stopped
[F] 14:01:34.752 - [Spell] Cast Moonfire (Moonfire)
14:01:34.889 - [Fight] Player Attack Mist Creeper (lvl 13)
[D] 14:01:35.833 - [Fight] Fight stopped
14:01:36.061 - [Fight] Player Attack Mist Creeper (lvl 13)
[F] 14:01:36.153 - [Spell] Cast Moonfire (Moonfire)
[D] 14:01:37.128 - [Fight] Fight stopped
14:01:37.361 - [Fight] Player Attack Mist Creeper (lvl 13)
[F] 14:01:37.535 - [Spell] Cast Moonfire (Moonfire)
[D] 14:01:38.250 - [Fight] Fight stopped
14:01:38.462 - [Fight] Player Attack Mist Creeper (lvl 13)
[F] 14:01:38.538 - [Spell] Cast Moonfire (Moonfire)
[D] 14:01:39.512 - [Fight] Fight stopped
14:01:39.827 - [Fight] Player Attack Mist Creeper (lvl 13)
[F] 14:01:39.918 - [Spell] Cast Moonfire (Moonfire)
[D] 14:01:40.896 - [Fight] Fight stopped
14:01:41.128 - [Fight] Player Attack Mist Creeper (lvl 13)
[F] 14:01:41.304 - [Spell] Cast Moonfire (Moonfire)
[D] 14:01:42.033 - [Fight] Fight stopped
14:01:42.262 - [Fight] Player Attack Mist Creeper (lvl 13)
[F] 14:01:42.303 - [Spell] Cast Moonfire (Moonfire)
[D] 14:01:43.312 - [Fight] Fight stopped
14:01:43.528 - [Fight] Player Attack Mist Creeper (lvl 13)
[F] 14:01:43.686 - [Spell] Cast Moonfire (Moonfire)
[D] 14:01:44.432 - [Fight] Fight stopped
14:01:44.661 - [Fight] Player Attack Mist Creeper (lvl 13)
[F] 14:01:44.670 - [Spell] Cast Moonfire (Moonfire)
[D] 14:01:45.647 - [Fight] Fight stopped
14:01:45.879 - [Fight] Player Attack Mist Creeper (lvl 13)
[F] 14:01:46.045 - [Spell] Cast Moonfire (Moonfire)
[D] 14:01:46.816 - [Fight] Fight stopped
[F] 14:01:47.035 - [Spell] Cast Moonfire (Moonfire)
14:01:47.078 - [Fight] Player Attack Mist Creeper (lvl 13)
[D] 14:01:48.049 - [Fight] Fight stopped
14:01:48.262 - [Fight] Player Attack Mist Creeper (lvl 13)
[F] 14:01:48.437 - [Spell] Cast Moonfire (Moonfire)
[D] 14:01:49.149 - [Fight] Fight stopped
14:01:49.379 - [Fight] Player Attack Mist Creeper (lvl 13)
[F] 14:01:49.437 - [Spell] Cast Moonfire (Moonfire)
[D] 14:01:50.437 - [Fight] Fight stopped
14:01:50.729 - [Fight] Player Attack Mist Creeper (lvl 13)
[F] 14:01:50.822 - [Spell] Cast Moonfire (Moonfire)
[D] 14:01:51.900 - [Fight] Fight stopped
14:01:52.096 - [Fight] Player Attacked by Mist Creeper (lvl 13)
[F] 14:01:52.255 - [Spell] Cast Moonfire (Moonfire)
[D] 14:01:52.985 - [Fight] Fight stopped
[D] 14:01:52.985 - [Fight] BlackList Mist Creeper during 30 sec
14:01:53.029 - [Fight] Player Attacked by Mist Creeper (lvl 13)
[F] 14:01:53.256 - [Spell] Cast Moonfire (Moonfire)
[F] 14:01:53.438 - [Spell] Cast Bear Form (Bear Form)
[D] 14:01:54.035 - [Fight] Fight stopped
[D] 14:01:54.035 - [Fight] BlackList Mist Creeper during 30 sec
14:01:54.079 - [Fight] Player Attacked by Mist Creeper (lvl 13)
[F] 14:01:54.436 - [Spell] Cast Moonfire (Moonfire)
[D] 14:01:55.050 - [Fight] Fight stopped
[D] 14:01:55.050 - [Fight] BlackList Mist Creeper during 30 sec
14:01:55.096 - [Fight] Player Attacked by Mist Creeper (lvl 13)
[F] 14:01:55.420 - [Spell] Cast Rejuvenation (Rejuvenation)
[D] 14:01:55.985 - [Fight] Fight stopped
[D] 14:01:55.985 - [Fight] BlackList Mist Creeper during 30 sec
14:01:56.029 - [Fight] Player Attacked by Mist Creeper (lvl 13)
[D] 14:01:56.923 - [Fight] Fight stopped
[D] 14:01:56.923 - [Fight] BlackList Mist Creeper during 30 sec
14:01:56.996 - [Fight] Player Attack Mist Creeper (lvl 13)
[D] 14:01:57.877 - [Fight] Fight stopped
14:01:58.755 - [Blacklist] 2 Units hostile Near Mist Creeper
14:01:58.843 - [Blacklist] 2 Units hostile Near Mist Creeper
14:01:58.894 - [Blacklist] 2 Units hostile Near Mist Creeper
14:01:59.097 - [Fight] Player Attack Mist Creeper (lvl 14)