I don't know how this is possible. If it's happening, it might be a bug (haha, bug). Someone feel free to correct me if I'm wrong but I'm pretty sure the way trees work is; 5 are guaranteed wasps, 10 are 100 bell coins, and 2 are furniture. Every other tree after that should be sticks and whatnot. So if you have less than 17 trees on your island, it's a random mix of those.
EDIT: I would like to add that I think that is if you are shaking them. I don't believe furniture or bells fall if you use an axe.