Gregorian chant bug?

[address@hidden]

I've been trying out the Gregorian chant mode in an effort to learn enough 
about it to help a friend with it.  I ran into some seemingly anomalous output 
and actually found quite similar strangeness in the docs.  Here:

http://www.lilypond.org/doc/v2.16/Documentation/notation/typesetting-gregorian-chant

...near the top of the page, under the heading, 'Gregorian chant contexts' 
there is a short example of some Gregorian chant.  At the second 
'\divisioMinima' (the whole line reads: c' \divisioMinima \break) the anomaly 
occurs.  The expected output, I believe is a 'c' punctum followed by the 
divisio minima and then the custos at the line break.  In the output, however, 
the divisio minima *precedes* the 'c' punctum.

-David