Bring text/line segments in Lilypond in the same vertical position

[amte]

I have many places in my Lilypond score where my line+text combination stand in different heights. I would like them to be in the same height.

I have defined these as:

```

dord = {\once \override TextSpanner.bound-details.right.text = # " ord "
        \once \override TextSpanner.bound-details.right.stencil-align-dir-y = #0
        \once\override Staff.TextSpanner.bound-details.right.arrow = ##t }
dspt = {\once \override TextSpanner.bound-details.right.text = # "  s.p. "
        \once \override TextSpanner.bound-details.right.stencil-align-dir-y = #0
        \once\override Staff.TextSpanner.bound-details.right.arrow = ##t }
```

How can I force them to stay on the same y-position?