HKN mouse offset

Hi all

Im trying to gather/loot with HKN in WoW and finding there is a vertical offset issue between my 2 screens.
The sizes of the windows are the same and the display resolution settings too. Ive tried using setview to make both screens the same but no joy. Ive added a 50 pixel offset to the mouse click but its a bit too hit/miss for me
Q1 does anyone have any suggestions to get the mouse clicks the same?
Q2 is there a way to find the mouse position on screen?
Thanks in anticipation of your assistance.

Not sure if it's the same issue but when I launch my 5 clients (1x 1920x1080 and 4x 960x540) i notice some height offset issues in the 4 shorter clients. Actually they aren't quite 1080 on large, or 540 on thebottom small ones, because the windows task bar protrudes overtop, so I clip the bottoms shorter. I think my actual settings are 1920x1050 (30px shorter) and I clip 30-40px off the bottom 2 small windows as well.

When I first login, I can't click the password field unless I'm 30-40px above it. But I have hotkeys setup to rotate my windows to the main screen. So the default is account 1 on the main screen, but I can press ctrl-alt-3 to cycle account 3 to the main screen, and so on. If I rotate through all 5 windows, and back to the start, this seems to fix it for me every time. Maybe that helps you?