1 Turntable mode, Beatmatch view

In "1 Turntable mode" I can switch deck focus/vinyl control with the TAB key between the decks and everything works fine - I can alternating control both decks with one turntable.
But one thing puzzles me:
Both waveforms of the beatmatch view are always responding simultaneously to the movement of the vinyl! In result: if you match the tempo of two tracks, the beatmatch view indicates two different tempos - what is predictable, since both track waveforms of the beatmatch view are erroneously "hanging" on the same needle
Not so needle view and the complete waveform of the decks; they both follow correctly the vinyl movement on the focused deck and internal sync on the non-focused deck. And the audible output to the mixer is also correct - so this is more a visual issue and the beatmatch view can not be used for beatmatching.
What am I doing wrong? Or is the beatmatch view simply not designed for "1 Turntable mode"?
Thanks in advance for some info
But one thing puzzles me:
Both waveforms of the beatmatch view are always responding simultaneously to the movement of the vinyl! In result: if you match the tempo of two tracks, the beatmatch view indicates two different tempos - what is predictable, since both track waveforms of the beatmatch view are erroneously "hanging" on the same needle

Not so needle view and the complete waveform of the decks; they both follow correctly the vinyl movement on the focused deck and internal sync on the non-focused deck. And the audible output to the mixer is also correct - so this is more a visual issue and the beatmatch view can not be used for beatmatching.
What am I doing wrong? Or is the beatmatch view simply not designed for "1 Turntable mode"?
Thanks in advance for some info