Simultaneous dotted notes

[Joel C. Salomon]

Minimal example:

\version "2.24.0"
\fixed c {
  \clef bass
  <<
    a4.->
    \\
    <d f a>2.
  >>
  <<
    a4->
    \\
    <d f a>2.
  >>

}

When I look real closely, I see four dots the first time and three dots the second; but the attached image shows how this looks in the source score, with the dotted-quarter note shifted horizontally from the dotted half-note chord.  To my untrained eye, that looks much clearer than what Lilypond is producing.

(a) Is the Lilypond default presentation really the better way of indicating this?  If so, I can just leave it alone.  Otherwise,

(b) I've tried following the examples in https://lilypond.org/doc/v2.24/Documentation/notation/multiple-voices#collision-resolution and https://lilypond.org/doc/v2.24/Documentation/learning/moving-objects, but I can’t figure out what I need to `\tweak` to accomplish this horizontal shift.

With thanks,
—Joel C. Salomon

Screenshot_20230102_112202.png
Description: PNG image