Moving a blog

[Chimera]

Hello,
I did a search first for what I was looking for but came up empty. Basically my problem is this. I started a blog on a free host to see if I liked it and if it liked me and to kind of learn the interface and mechanics. Now it is time to move said blog from the free host to a server home of it's own. Wordpress and the like are still pretty new to me so I am going by touchy feely and other's advice just now.
I decided to move my few posts by hand but found that everything i put into Word Press was dated the day I moved it. Is there a way to move these posts and not have them dated all one day?
Moving from http://spank-me.thumblogger.com
to http://www.spicey-blogs.com/blog/
I do not have link trades or feeds to worry with (intentionally since I was pretty sure this was going to be a long term project and did not want them disrupted by moving). I won't have any outside links until I can move my posts and customize the blog.
Any advice you can give would be appreciated.