OK, I know you must have done that already but let me tell you what I do every time after I change the program settings:
1. Copy the program to the light.
2. Save the program somewhere on my computer.
3. Click on the Start-Up button.
4. Exit the V-link application.
5. Turn off the power of the light fixture, wait for 2 minutes, then turn it back on.
6. Open the V-link application and click on the Day Program on the app, make sure that the graph it fetches from the light is exactly the same that you have previously programmed.
7. Exit the V-link app, no need to save anything even if it prompts you to.
Good luck.