If I understand your issue correctly, it appears like you are trying to warp the grid in such a way that certain tracks stay in their current location in time while other tracks move with the warp. The solution to this is to lock the tracks you want to stay put—by clicking the padlock symbol on the tracks—and setting the timebase to linear—by clicking the quarter-note symbol on the tracks to turn it into a clock symbol. When you warp the grid, the locked tracks will stay put while the unlocked ones will warp.
Also, if you want to remove the tempo track without affecting anything, lock all of the tracks except the tempo track, set the timebase on all of the tracks to linear, then delete the tempo track.
You can also lock individual events if that better suits your needs. Select an event, and in the info bar (or whatever that black bar is called that contains the name of the event) click “lock” to choose whether you want to lock the event’s size, position, etc.