I think is because many player that already grant access to maus floor 3&4 just like to skip maus 1&2 ..they just make fast join button spamming friend list if there's any on list that run maus floor 3 or 4..or even they do run floor 1&2 they just skip all the mini bosses until reach the floor 3 up, the worst part sometime i found when joining floor 4 that contain voriyana are left un-finished, ppl only kill vori and remap..so in general i think this would affect the global 400k kill bosses progress

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