RB's Wiimote driver will automatically assume a button release as soon 
as you press another button without releasing the other one first. 
Reason being that *many* actions will - due to their nature - not be 
able to work correctly or at all if they are executed at the same 
time. F.ex. while pressing several keys at the same time is desirable 
for games, it is not for applications:

If one action sends a keystroke Apple + K and another one Alt + R, the 
keystroke will end up as Apple + Alt + K + R - with unknown and 
possibly unwanted effects.

There are even more problems if you'd try to concurrently run two 
AppleScripts targetting the same applicaton.

The current implementation ensures that none of these problems can 
occur.

Best regards, 
Felix