Why did I get penalized for this?

[DarkmoonVael]

@SalemP

This is not correct. If you leave a duty with one member missing you won't get penalized. I did this a ton and never got penalized for it.

Can only imagine what Avant_Garde already said. If you leve a duty the very second a new member steps in filling it up to the required number of players again, you will get penalized. Shit happens, but should be a very rare case. ^^

Yep, what MrCookTM sayes here is right. You get the penalty when you leave a full group. If someone leaves before you do and then you leave when the group isnt full, you dont get the penalty. However, what happens sometimes is that just as you leave, someone else joins, so the game sees you leaving a full group, and applies the penalty.