It seems to me as one or more inconvenient item that :
- http links to categories and others informations as stored in database "posts" field "guid" too absolute.
A link like /wordpress/?.. (without http://servername/ prefix) is sufficient. A such disposition autorize to share (for read) a same table between different servers.
- A same remark about http pages generated, around links generated for "Posted in " ...
To resume, don't use as possible http://servername/xxx notation but only /xxx .
The servername resolution is only done at the 1st access to the blog.
I can explain more if necessary.