Target Duration works only to the right. Why are you doing this?

[Paul_Gringo]

I want to move the track to the left, but I can only be 5 seconds. This is stupid, why do this?

[R Neil Haugen]

I'm not sure I understand ... normally you snap to the beginning, then use remix to match the length ... did you snap to the end first?

[Paul_Gringo]

I have a track. I can make her length, but I can’t do it shorter. I use the mouse and I can’t move track more than 5 seconds to the left. Only to the right.The mouse movement to the left is blocked. Only 5 second and blocked. The track does not matter

[Warren Heaton]

I'm not sure if this will help or not:

To have Remix extend toward the start of a sound clip, we have to click and drag with the Remix Tool from the left edge of the Clip Boundary to the left in the Timeline.

If it snaps back and we get the "Remix Error:  Selected clip is too short. Try again with a longer clip.", then we need to give Remix a longer clip to work with.