Maybe try turning off the wifi on your phone as we trade and see if that helps? When I turn off my laptop's wifi for trades, the wifi on my 3DS works better.
What, you could have kept her! And also, I'm finally back lol. I hope you were able to get Merengue out this time. ;_; If you still have Flurry I'll try and sell off Genji quickly since he randomly moved in & I'm not that big of a fan of him.