That is unusual. It looks to me that something is not set up correctly with the site’s URL structure. I tried signing up for the newsletter on the home page and I was redirected to the blog page like you said. What’s odd is the blog page that it is taking me to has the same URL as the home page (http://www.careertc.org/). We shouldn’t be able to pull up the posts page at that URL. Why that’s happening I don’t know, but I would check on those URLs, reading settings and your permalinks to see if you can get to the bottom of it.