What are the steps leading up to the bug?
Can you describe what happened?
What is supposed to happen instead?
Alright, so I hope this is all the information you need.
Get Homing Balloons from Rose's Garage (Completed).
I'm on my other account, @Sierra_Lightspark. I sent off three boxes and the Aether Injector, and there's still no extra fourth box. I'm aware of the many threads made about this topic, and nothing helped, so here I am making this topic. (If this is something that someone else can help me with, and it ends up not being a bug, my apologies. A moderator can lock the topic.
)
Uh... I'm supposed to find all four boxes and the Aether Injector and complete the quest. 
So sorry to have to ask for more help, @Coop_Blimppenny. 
(P.S. Restating what I said: (If this is something that someone else can help me with, and it ends up not being a bug, my apologies. PLEASE help if you can, even if you're not a staff member. A moderator can lock the topic if this isn't a bug.
)