Problems Multitrack-Recording


I am using Windows 10 and Audacity 2.2.1.
I have Steinberg Ur 12 Soundcard.

I have a problem when I try to record more than 1 track.
The problem is that when I record the second track the half of the sound from the first track is put in the second track.
For example I record first acoustic guitar in the first track and then I want to record only vocals in the second track.
The problem is that on the second track the sound from track 1 is being recorded, I want for example only vocals in the second track.
Hope you understand me, my english is not the best.

Best wishes

Select your USB interface as your [u]Recording Device[/u] and it will only record what’s coming-out of your interface. (Do not select select “loopback” or “Stereo Mix”.)

I have done that but there is still the same problem.