Get 5 multi-kills in Team Deathmatch Wrong

A double kill is a multi-kill, it is only tracking triple kills. The team deathmatch game loop is not designed to achieve triple kills at any consistent rate without an extremely high level of skill expression, and even in those instances there is still a large level of luck involved for getting this challenge done, in a manner that is not in line with the difficulty of other weekly challenges (particularly a 5 BP points reward challenge), so I can only assume it is meant to track double kills and is not. Please fix bug.