[Plugin: Co-Authors] Posts count

Hi. Have some interesting problem.
When you add author and co-authors in the post, the post is counting for the author and not for co-authors. For example, in dashboard you see how many posts any authors leaves, so, if some was co-author the number of posts is 0 for him. I try to echo number of posts for each author, and many of them have 0 posts.

Can you solved this problem?