when i'm working on my project after some time, a new track or bus is created. i never created those tracks/buses.
i have to delete them.
i think those are command binded. what keyboard command "ctrl+??" or whatever could create new track. 
maybe i just do those by accident. any idea anyone? ty

Insert a track would be the 'insert' key, don't know about a bus

u seems right ty :)