PHP - variables not comparing to one another

I am doing a password reset page for my website and when a user puts a new password on the it goes to the PHP with this code:

Until now I cannot make the php compare the two new entered passwords to verify if they are equal or not, it simply jumps over that part.

P.S. don't mind the $senha = md5($password) it is like this for easy troubleshoot on localhost (MAMP).

<?php
session_start();
include("connectivity.php");

$user_id = $_SESSION['ResetUtilizadorID'];
$password1 = $_POST['password1'];
$password2 = $_POST['password2'];

$sql = mysqli_query($conn, "SELECT FROM usuarios WHERE id ='".$user_id."'");
$password = $password1;
$senha = md5($password);
$adminID = $_SESSION['usuarioNiveisAcessoId'];

if (strpos($user_id,$adminID) == true) {
$_SESSION['avisoReset'] = "WARNING: Not possible to change admin passoword.";
header('Location: ../login/reset_password.php');
} else {
while ($row = mysqli_fetch_array($query)) {
    if ($senha == $row['senha']){
        $_SESSION['avisoReset'] = "Password already taken";
        header('Location: ../login/reset_password.php');
    } else {
        if ($_POST['password1'] !== $_POST['password2']){
            $_SESSION['avisoReset'] = "Passwords are not equal";
            header('Location: ../login/reset_password.php');
        } else {
            mysqli_query($conn, "UPDATE usuarios SET senha = '".$senha."' WHERE id='".$user_id."'");
            $sql = 'SELECT * FROM usuarios';

            $query = mysqli_query($conn, $sql);

            if (!$query) {
                die ('SQL Error: ' . mysqli_error($conn));
            }

            $_SESSION['avisoReset'] = "New password set";
            //header('Location: ../login/reset_password.php');
        }
    }
  }
}
?>