I had the problem where it opened garage 1 but I needed it to open garage 3. It's not the easiest setting to find.
To get it to open the correct Homelink device:
- Go to Settings
- Driver Assistance
- Under Autopark, choose Customize
- Temporarily enable Use Auto Homelink (might already be enabled)
- Choose the Homelink device you want to use via the app
- Disable Use Auto Homelink (or leave it enabled if you like)