On Thursday we redirected an older site to one of our other sites to reduce duplicate content issues. On Friday the redirected to site was knocked down the Google results (from page 1 to page 6). We checked webmaster tools and they are telling us we have doorway pages.
After looking at the description of doorway pages I am confident we do not have these. I spoke with netmeg on twitter and she recommended coming here for advice.
I am starting to think that something went awry with the 301 but not sure how to fix it. I understand I cannot give out site names here, so it is hard to describe. Signed up as a supporter but for some reason it won't let me on the forums.
Any ideas out there or maybe someone has seen this happen before.