repeat barline problem in StaffGroup

[Tao Cumplido]

Hello all,

I have a problem with a repeat barline in a StaffGroup and a PianoStaff.
It looks more or less like this:

|: ====
|:
|: ====

So there is this double dot also between the staves.
It only happens two times in my score but I have no idea why.

In the attachment I extracted the horns from my score and now it actually 
happens three times. And also on different spots.
Here bars 105, 150 and 168.
Well, I hope someone can help me, so that I can correct my whole score.

regards,

Tao
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repeat-bar-problem.ly
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