We recommend our users do not use Word or Publisher to create emails or blog posts. These applications create additional styling and HTML code that can cause layout problems like your blog post previews showing weird characters and email delivery issues, like a higher possibility of spam filtering. Plus, once that code's in place, it often can't be changed or it can be very time consuming to remove the code.
Here is an example of how the preview for a blog will look if you copy and past from Microsoft Office:
And here is some of the excess formatting that transfers over when content is copied over from Microsoft Office:
What we recommend is that you create your blog posts and email content from within the CINC CRM using our WYSIWYG editor to ensure that the content looks like it should.