hi! and welcome : )

i had that problem as well (jumping, doing random things on clone while typing on main (got her (and a couple of hordes) killed in gadgetzan by an "accidental" frost cone)). then i found the mute button in keyclone (default "pause" i think) which turns off broadcasting of keys.

second one, click back to that window and click all movement keys ... basically WoW has registered a downclick, but not a release, so it thinks you are still pressing the button.

- nasaRed