I have never gotten a notification that I have completed all the quests, but I finished all the quests awhile ago. They probably never did it because there are more quests to come.
Have you tried putting anything in one of the cactus growers?
There are 3 trading quests in which you trade with the Aethasians. The three starting items are 1. The Pastry Lunchables. 2. Orange Fuzzy Dice. and 3. An AUMS card.
So you take each of those items and give it to the Aethasian that you think will want it. If you give it to the wrong person, they will refuse it and might give you a hint as to who might need it. After you give the item to the correct Aethasian, they will in turn, give you another special item. Then you are to find who gets that item, and so on. I don't remember who many items are to be traded, but at the end, someone will trade what you have given them for a key. So the 3 trading quests will get you a key at the end of each one. which you can then use to open a certain chest.
Right now, there is a glitch with the Fuzzy Dice. You are correct that it goes to Edmund, but with the glitch he will not accept it or even acknowledge that you are trying to give them to him...
There is a 4th chest
Hope that helps!!!