What you were expecting to happen, and what actually happened?
I put 225000 gold into a guild task, and received an error message. I got thrown out of the guild menu to the world map, and saw that the 225000 was indeed deducted from my total. I also received 10 keys that was apparently the reward for completing the task.
Going back into the guild task screen I noticed that the task has not been completed. It is still indicating task 9/12. What is further remarkable is that the task is showing that the reward should be 6 event keys, but I am sure that I received 10 event keys in the mail. My estimate is that the task has been competed, probably even more then once, but that the display is wrong.
That always happens when people clear the task as you put your gold in it.
Or when the server craps itself.