I was at the crafter and needed to sell some chests to get some money for affixes.
I had 55 chests, split off a stack of 5 chests to sell, and donated those five and it somehow donated BOTH stacks of chests!!
Be careful!
(And yes, I'm contacting support over this, just letting everyone know the game is being stupid today - also it randomly played a cutscene for a lot of people in my guild today despite none of us being in parties, so the ghosts are definitely in the machine today!)