I tried trading 25 earthquakes to a friend today. They transferred into the trade area just fine but the announcment that summarizes the trade stated I gave him only 8 cards and he actually only recieved 8 cards. All 25 of my cards are gone from my backpack!
My level 1 dandelions and level 1 honey sickles now have level 2 bugs! How is a new gardener supposed to deal with that?!?
Have just experianced a similiar issue with trading of cards. Very uncool :( You should post a warning upon logging in so people stop trading until it's resolved.
I had same problem only one or a few cards would transfer and they would appear to dissapear from your inventory but if you log out and back in they reappear. Very inconvenient though until this is fixed.