auto beaming strangeness

[Adam Good]

Hi I'm using Dev version 2.11.27-1

I would expect the following example with 9/8 time sig to be grouped  
and auto beamed in 2+2+2+3

%%%%%
\version "2.11.17-1"

\relative a' {

\time 9/8

 #(override-auto-beam-setting '(end * * * *) 2 8)
 #(override-auto-beam-setting '(end * * * *) 4 8)
 #(override-auto-beam-setting '(end * * * *) 6 8)

a8 b c d e f g4. g8 f e d c b a4. }
%%%%%

but it outputs a grouping of 2+1+1+2+3

in other words the 2nd and 3rd 8th notes should be beamed together  
automatically but they're not. What's going on there?

Adam