Re: Moving blog posts
You can edit the blog post data in your Tiki database if you access the db directly with phpMyAdmin or some other utility. I don't think there's any way to update a blog post via Tiki without having its post time reset.
(This is ironic. The other day somebody wanted to update a news article and have it move to the top of the list instead of staying in its old position. It seems blog posts and articles have opposite default behaviors when being edited/updated.)
-- Gary