pim assert and DR.. Is it really just metric?

guys, I've just spent the night trying to figure out what the hell was
happening with my multicast lab and a specific task of my wb.

I've asked some help here and there and another kind ccie candidate tried
to help me.
To make the story short and easy, everything started from a basic lab where
I was trying to look at the assert message and where we have seen some
unexpected behavior.

I would like to have some opinion on this. Everything is explained on this
blog post just written http://mellowd.co.uk/ccie/?p=3250

If someone could take a look it would be nice.

thanks for your help.

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