It should be in the Bug-Report, but nevermind.

We are aware about the missing cable texture, this will be fixed in the upcoming update.

About the music, actually if you press another "mode" without disabling them first, this mess with few logics. But this behaviour will be fixed in the final release, as these buttons are temporary development features.

Just to be clear, does it automatically update the map when you update it, or do I need to manually reinstall/update the map? I'm sort of 'new' to GMod, just coming back from awhile.

Every addon on Steam automatically update in background when you have Steam is launched, or forced when you start your games don't worry.

As usualy, we share news about updates and releases on our Steam group, Facebook, in the addon title, discussions and this time we will also add a tiny version notice in the main thumbnail. You can't miss notifications if you follow us :)

Alright, thank you!