Cursor oddity with AOE

Hello,

I've run into a bit of a problem since I sorted out my team for AOE. I have a druid tank, druid healer and 3 locks - tank is on my main screen, locks/healer are on a different monitor

I'm using the "Pass Mouse Click Hotkey" function of Keyclone as follows:

* Start my tank pull, build up my aggro
* Manually move my cursor to one of the warlocks screens
* Hit the "Pass Mouse Click Hotkey" button, press my keybind for Rain of Fire and (on this first lock) move the targeting area into the right position and left-click.
* This gets passed to the other 2 locks and eventually the cursor is back on the tank screen.
* I disable "Pass Mouse Click Hotkey"

All well and good, here's where it goes a bit funky. My targeting area is now in the right place on all 3 locks so rather than having to go through the passing of mouse clicks again when RoF expires, I want to do this:

* Hit the Rain of Fire keybind as before
* Press a different button that I've set up to act as a left mouse click as per this thread:

How to use Targetable AoE's multiboxing with in game macro's (no addons or programs needed)!

The trouble is - while it works - this new button makes my cursor vanish from the tank screen and appear on a random different window - it's a pain in the bum dragging it back all the time.

Has anyone else had this problem and is there a way around it? The binding I've used for the left-click simulation is not in any way bound to anything on my tank, nor is it used anywhere in Keyclone itself.

Edit - one more thing, when the mouse jumps to the other windows and I have to pull it back, that obviously screws up the position of the AOE target.