Was there some sort of scheduled maintenance for the wifi use in ACNL? Both I and another have gotten this message when trying to connect. Mostly I'm just trying to see if anyone else has... And if they have figured out how to fix it.
Maintenance is just necessary sometimes. Ask any mmo player. XD It keeps things running smoothly, and it will go away eventually. It usually takes a couple hours.
Ahhh my friend was visiting my town to see a villager I got for him and it derped in the middle of the visit e_e he also dropped me some axes and I NEED TO CUT DOWN THESE TREES LOL...
The duplication glitch is most likely coming on the way the game saves, rather than a network-related issue. The weekly server maintenance is there to maintain the stability of the network, and not to provide a patch for the game.