changing vertical position of tremolo beams

[Pato Press]

Hi list,

At the second bar of these example,

\version "2.14.2"

\relative b'' {
  e2 <d g>2:32 |
  <d g>1:32 |
  <d g>2:32  r2 |
}

the repeat beam step over the additional lines of the chord notes.

(The image shows the result of the example)


How do I change the vertical position of the beam so it gets under the additional lines?

Thanks

tdy.