All but first post opens slow.

Hey guys I’m brand new to WordPress and I’m having a strange problem. I am using WP 3.0.1 that was an automatic install from My web host. I’ve only got 4 posts so far and all but the first post loads slow when you click to view it.

The site as a whole loads fast and the first post loads fast, about .5 seconds. All the other posts that I created after that takes about 5.5 seconds. I’ve tried using 2 different cache plugins and changing my theme but it makes no difference. Has anyone ever experienced anything like this before. My site URL is https://www.thraxipedia.com if someone wants to look at this. Any help as to what may be causing this will be appreciated. Thank you.