HI there, i have some question who have experience with blogspot..

i had a site that ranked on 10.. and i only have 1 post and 1 page..
so i see that a lot of people suggest to put more articles since my site is MFA..
If i have new articles and i wanna post it to my blog but i wanna post to the date before my old post (if my old post was today - then i wanna post me new articles at date of yesterday) .. is that effect my ranking ?? (that will dropped)