I watched the replay and I saw quite a number of times that you didn't take your foot fully off the accelerator when you have the clutch in and you are changing gear...
Follow these exactly and you won't have a problem...
1. Throttle off
2. Clutch in
3. Change gear
4. Clutch out
5. Throttle on
Make sure you lift fully off the throttle when you change gear
In Live For Speed the clutch is automatically pushed in and the accellerator aswell when you press the Ignition button...
In real life, the manual cars need for you to do this yourself (push the clutch in, push the accelerator in and then use the ignition...)
This would only be in manual car with auto-clutch off
I think this would inhance the simulaton experiance, vote on what u think