php - Weird behavior in database -

i have simple script inserts user's email, , posts table. works , it's inserting them incorrectly.

the script:

if (isset($_post["submit"]) == 1) {     $posts = $_post["posts"];     $insert_post = $conn->prepare("insert posts (email, the_posts) values (:user_id, :posts)");     $insert_post->bindparam(":user_id", $_session["user_id"]);     $insert_post->bindparam(":posts", $posts);     $insert_post->execute();     echo "<script>alert('successfully posted!');</script>"; } 

$_session["user_id"] user's email. when submit post, email column gets post , post column displays email instead??

structure of database:

id int(11) auto_increment    email varchar(255) latin1_swedish_ci the_posts archar(255) latin1_swedish_ci