ok so I'm trying to set up a music bot. i open the first instance login and thats my regular account.
get the 2nd one up edit the name change to audio cable 1. but when i log in it reverts to the regular account name and it gets kicked. what am i missing?
As you can't login with one account twice at the same time you need to supress the certificate sending (Configure -> Settings -> Network -> "Suppress certificate and password storage). You also need to change your nickname.
The better method is to create a portable Mumble for your music bot. To do that copy your mumble directory (c:\programxxxxx\Mumble) onto your desktop and create a file named mumble.ini (NOT mumble.ini.txt) in that directory. When you start this Mumble, all settings will be stored in this file instead of the Windows registry. Create a new certificate in that portable version. Now you can use one account only for your music bot.