I’d rather not post the site, so I’ll be as descriptive as possible.
Theme: TwentyEleven
I have 3 pages titled: Home, About, Blog
In Settings->Reading I have set the frontpage to the static page Home and my posts page to Blog.
That should be easy enough to understand, pretty basic.
I have two posts published titled: Post 1, Post 2
Now here is the quirk…
In the sidebar I put the stock Recent Posts widget.
On the Blog page the widget displays as it should…
Post 2
Post 1
However, on the Home and About (and all non-blog) pages it displays…
Post 1
Post 1
…I can’t figure out why.