like other keyframe situations?

It doesn't appear to be the case. I double-click the little surround panner to open up the big Surround Panner. I activate The Surround Panner Keyframes on the desired track. I drag the diamond to the for left of the Surround Panner. I move down 5 seconds of the timeline, create another keyframe, double-click it to open another Surround Panner, and its setting is like the first keyframe's settings. I drag the diamond to the right, and instead of getting a transition from left to right, I just get a right pan. Help? Vegas 5