I was in Sewer today, and noticed that my 3-man team was getting relatively low EXP, about 9 per person, and one of us was mastered, so the other two should have been getting the same EXP as if only two people were there. I did /party who, and found several more people in the party than were in the MA. I PE'd it but was told to post it here, so I'm posting screens of the three players in MA and the extra people in the party. I'd also like to add that these people weren't even spectating, so I don't know where they were to leech the EXP.
People in MA, including myself:
People in party:
I really hope this can be resolved, it's not fun when I don't get the EXP I deserve because of people that aren't even there.