Accidentals in C15 pro score and descending bass

Scoring in D minor with one flat in teh key signature – when I enter a chord with a different bass note - ala Cm7/ Bb, sometimes Cubase make it A#. Similar, B# instead of C. It’s only with an indicated bass note. Is there a setting I’m missing?

Also
I wrote a song with a descending Bass pattern – D, Dmaj7/C#, D7/C, D6/B. But C15 shows D, /C#, /C, /B. I want it to show the full chord. And I can’t find the setting for that, I guess it would be “Show full chord” or something?

For your first issue:

It does not work on chord symbols.

Found it, and the solution is do not work with the chord symbols, as they appear is a score, but work with the chord track..

Now onto the compound chord problem..