Your UCA222 may have been 'seen' by your computer as a microphone so will be set by windows to record in mono. If your DAW is set to record in stereo then both channels will have the same audio. You will need set windows to record the device in stereo, to do this:
- Right click on the Speaker icon and select 'Recording Devices'.
- Right click on USB Audio Codec and select 'Properties'.
- Go to the 'Advanced' tab.
- Select '2 channel, 16 bit, 44100 Hz'
Your UCA222 will now record in true stereo.