Duration dot error with shifted notes

[Devon LePage]

I’m currently engraving Debussy’s “La Fille aux Cheveux de Lin.” LilyPond has come up with a problem, and I’m having trouble understanding why it’s happening.

It occurs on the lower staff in the third measure of the last line. The music here involves three voices. I want the dotted half notes in voices one and two to line up vertically, while the quarter notes in the third voice are shifted slightly to the right. However, the dots appear to the right of the third voice!

Here’s a picture of what’s happening in LilyPond (keep in mind, the engraving is still a work in progress!):

I’m using LilyPond version 2.19.40.

Here’s a short gist with only the LilyPond code for the lower staff for the last line: https://gist.github.com/devonlepage/6533ca0b207ccd5084920efd5ddb6359

Although I’ve been using the original Durand edition, here’s a link to an image of the last line in the Peters edition, where the three voices are more clearly delineated: https://imagebin.ca/v/3OdSMIiuB7iP

I hope that someone can help me solve this issue.

Thanks!

-Devon.