When the melody part plays as normal, yet the notation is different, you likely went the 'Notation Options/Transpose Settings' route. This approach does not affect the sound, it only affects the notation - for Melody and Soloist simultaneously.

Applying 36 for Transpose would mean to transpose 3 octaves - one octave comprises 12 notes.

If you want to have the Soloist (containing now the Bass line) and the Melody printed on one sheet (feasible via the LeadSheet Window) it would be indispensable to go the 'Transpose Soloist only' route. That approach leaves the Melody alone and gets you to second base.

Martin