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when displaying one from latest blog post or just visiting blog index page, post in body content page are identical posts in "Other Posts" section in sidebar.
I think there would be two possible solutions:
Rename section "Other posts" to "Latest post" and there would be logical if some latest displayed blog post is also linked in section "Latest posts" and also hide this "Latest posts" section from blog index page because "Latest post" are identical to posts in body section.
Second: Exclude posts displayed in body section from sidebar other posts section.
I hope I explain this issue clearly :)
btw don't hesitate to correct my english..