Dreamcast-Talk.com

I've just got this BlueRetro device delivered to my doorstep.

Got any tips setting it up? I mean configwise.
Already connected my controller to it and it's working. I just need some more guidance setting it up.
For instance:
- I see global config and game ID, what are the differences?
- With global config do I need to set the system to auto or do I need to choose DC?

Also any time when I connect through the BlueRetro website to check config or update firmware I need to connect multiple times before it loads.
First time it pairs I think (I've got the device showing up with an antenne in front) and second time I need to connect again for the option (firmware update menu, advanced config menu) loads up, second time it shows the device with a bluetooth icon in front.
Is this normal?