TimeStamp Error when insert a new post

Hello, i want to insert a new post directly to the SQL data base.
I went to wp-posts, inserted a new file and filled all the form with all required data.
I selected “future” because time is some minutes after the moment i posted it. But i can not get that this post go to HomePage and change the status to “publish” after time is over.
I tried adding a post with future timestamp directly from the dashboard and it goes to the homepage when time is over, but no every time i try to add it directly from sql database.

I need to do it because i want to “randomizer” about 1000 posts in one of my blogs, i dont want that my 2 blogs have the same posts, posted at same time, so i changed the post id, and want to change the timestamp, but i cant.

I need to do it directly from SQL because there are +1,000 post in database, so is very difficult to change one by one in the dashboard.

I will appreciate your help, i need to do it this weekend and i searched google and support and cant find anything about this error.

I entered all fields in the correct order, and the correct date format, all is fine, i dont know if wordpress save all “future posts” in another table as “schedule”, i looked it but i cant find this table.

Wait for your reply please.
Thanks

DARO