To clarify the random is that it might be the second cast or the 4th cast never the first. It happens every time i play my monk and shaman (the only ones i have played on). I also tested what you said. I have everything key bound so no clicking. I did try clicking them however and did not get the issue.
I also tried what you said in the second part about pressing and holding until its in the spot you want then releasing it. That does not work that way on my game if i press and hold it then release it nothing happens I have to mouse click on the ground for it to place it in world unless it does its wired auto-drop (its working just like the drop at cursor macro i see a lot of people use).
Thank you for your thoughts