Steve,
Couple items of note if you are using the Samsung Gear360 Action Director.
1. Go to preferences and select editing from the list and check the Automatically remove wobbles........
Selecting that will make the stitching orient the horizon on a correct sight line because the camera has a gyroscope built in.
2. The camera will automatically stitch by virtue of just dragging the clips in the timeline. No need to select the produce icon. Once the videos are stitched you can right click the stitched clip and find out the clip location. The file is stitched in the user--> documents --> Cyberlink --> Action director --> 1.0 --> 360.
That way you can copy the files to your folder and use a program like Vegas or DaVinci to do the editing with already stitched images. I am guessing Vegas has its own stitching program but I do not own the software so not 100% sure.
Sidd