I try record a stereo input and I connected the my tape stereo out to UR22 two input. Left side tape output to left side Steinberg input, and right side tape output to right side Steinberg input. When I try record to WaveLab, the WaveLab recording a stereo channel but both record is same, not different. The WaveLab recording two mixed mono channels. When I listen the Steinberg output, the two stereo channel is not different. Somewhere the UR22 mixing the two channels to a mono channel and output will two same mixed mono channels. Why?