Hello there Hamma, and welcome to the forum.
The most likely cause of your problem is that you've inadvertently selected
Offset Mode for the projects.
If you have, you will see a plus sign (
+) next to all the controls that can be offset - typically the Volume and Pan controls.
To return to 'normal' Envelope Mode, simply press the letter '
O' key on your PC keyboard (accidentally clicking this is how Offset Mode is usually turned on inadvertently):
Hope that helps, let us know if it doesn't and we can dig a bit deeper.
Steve
Edit - as I don't have Guitar Tracks installed on this computer, the animation is from Cakewalk SONAR 8.5 Console View; but you will see the same effect in GT4.