Hi if you want to change the post order in new blogger follow following steps:-
1. Create new post or Go to Edit for already created post
2. On the right hand side of Post you will find Published on description.Click it
3. Click set Date and time
4. Now if you want that your post should not appear on front page just change the Date to a very old..e.g 10 June 2009..
5. Or if you want your post to be published in future some time .Set the Date for future..e.g August 2015..Your post will not be published until specified date comes.
6. Click Done
7. Now publish your post