problem with bartype in staffcontext

[Thorkil Wolvendans]

Hi group,

I'm typesetting a piece for piano, in which the righthand has most of the 
time a different timesignature than the lefthand. This works great by 
chaning the timing_engraver from the score_context to the staff_context, 
but the problem is this:
the default bartype is dotted, but when the the two staves have the same 
timesignature, the bartype changes to normal. I change the bartype in both 
staves manually, which works in the upperstaff but the lowerstaff doesn't 
stays dotted.
Is this a bug or my fault? I attached a file wihich illustrates the problem.
Regards,
Thorkil

BTW: I work with lily 2.2.2 on cygwin.

partituur.png
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