Black List not working as supposed

[N_Kyong]

Date & Time: 12.12.17
Frequency: always
World name: Louisoix
Character name: Nevae Kyong
Retainer name: not relevant
NPC name: not relevant
Monster name: not relevant
Class/Level: MCH/64
Party or solo: Party/Solo
In-game time: 0:12
Area and coordinates: all
Housing: not relevant
Steps:
1. Adding a player to black list
2. Get thrown via party finder in a dungeon again with blacklisted player

3. A black list is useless when I do have to read from/play with such players again

Connection Specs
- Type of internet connection/provider: not relevant
- Modem maker/model number: not relevant

■ PC Specs not relevant