In Sony Vegas Pro and Movie Studio Platinum there is a plug-in named "Stereoscopic Adjust" that can give baffling results when you use Auto Adjust. When you move the timeline cursor to a pair of frames that look good for making auto adjustments, the paired frames used to make the adjustments may not be the ones under the timeline media cursor. Sony Vegas uses the animation cursor to determine the pair used, even if you haven't turned on animation. Unless the animation cursor is automatically synced to the timeline cursor, moving the timeline cursor to a desired pair of frames doesn't guarantee that that pair will be used. What is bothersome is that there's no indication that the cursors are synced until you open the animation panel, as if to keyframe, and see if the Sync Cursors button is pushed in. Furthermore, the Sync Cursors button is usually too far left out of the window requiring a dialogbox resize. The state of the Sync button persists even after closing the animation panel. The position of the animation cursor persists even if the Sync button is off and the panel is closed.
Beside the point, if cursors are synced, but I still don't get accurate results, I will use the Sony Threshold plug-in ahead of the Stereoscopic Adjust plug-in. I move the Threshold slider to somewhere between 18 and 50 to reduce the amount of detail the Stereoscopic Adjust plug-in has to deal with. Sometimes I take out too much or too little detail, and will have to make a few tries. Afterwards I remove the Sony Threshold plug-in.
This affects both Vegas Pro and Vegas Movie Studio Platinum.
The Stereoscopic Adjust plug-in might be the only Sony plug-in that works like this, but I don't know.