Missing comments when switching blogger to google plus comment box?

"'Dewa Inside' via Blogger Developer Group" <[email protected]>
Newsgroups gmane.comp.web.blogger.api
Message-ID <[email protected]> 
I changed the comments from bloggers to google plus. Previous contents of 
the comments that I have are 115 comments. But when I switch to google plus 
just remain few comments in the box.
How could this happen?
And what should I do to bring the rest of the comments are missing?

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