mydW blogs have a rich set of authoring options. You can have multiple personal blogs, group blogs and blogs tied to a mydW community. With that richness comes one small but confusing behavior - if you are an author of a personal blog and a blog tied to a community there are situations where blog links will redirect to your community blog and not your personal blog. To prevent this make sure you pick a blog, probably your personal blog, as your primary blog.
Here’s a screenshot of how to do it: