Problemas de carga de varias imágenes

Para el primer error, la matriz de errores está fuera del foreah, por lo que no borra el error para cada archivo, y la consulta para insertar está fuera del if que verifica los errores, por lo que siempre se ejecuta

Para el segundo error igual, la consulta se ejecuta siempre hay que comprobar si el archivo está subido.

<?php

    include_once('connect.php');

    if(isset($_FILES['files'])){
        $filesErrors = 0;
        foreach($_FILES['files']['tmp_name'] as $key => $tmp_name ){
            // MOved errors inside the foreach to clear it each loop
            $errors = array();

            // Check file is uploaded
            if ($_FILES['files']['error'][$key] == UPLOAD_ERR_NO_FILE){
                // Continue with the next file
                continue; 
            }

            $file_name = $key.$_FILES['files']['name'][$key];
            $file_size = $_FILES['files']['size'][$key];
            $file_type = $_FILES['files']['type'][$key];

            if($file_type == "image/gif"){
                $sExt = ".gif";
            } elseif($file_type == "image/jpeg" || $file_type == "image/pjpeg"){
                $sExt = ".jpg";
            } elseif($file_type == "image/png" || $file_type == "image/x-png"){
                $sExt = ".png";
            }
            if (!in_array($sExt, array('.gif','.jpg','.png'))) {
                $errors[] = "Image types alowed are (.gif, .jpg, .png) only!";
            }

            $file_tmp = $_FILES['files']['tmp_name'][$key];
            $file_type = $_FILES['files']['type'][$key];
            if($file_size > 2097152){
                $errors[]='File size must be less than 2 MB';
            }    


            if(empty($errors) == true){
                $desired_dir = "user_data";
                // Execute query inside the errors check
                $query = "INSERT into offers_pics (`offer_id`,`pic_name`,`pic_type`) VALUES ('$user_id','$file_name','$file_type'); ";
                $result = mysqli_query($link,$query);

                if(is_dir($desired_dir) == false){
                    mkdir("$desired_dir", 0700);        // Create directory if it does not exist
                }
                if(is_dir("$desired_dir/".$file_name) == false){
                    move_uploaded_file($file_tmp,"$desired_dir/".$file_name);
                }else{                                  // rename the file if another one exist
                    $new_dir = "$desired_dir/".$file_name.time();
                     rename($file_tmp,$new_dir) ;               
                }
            }else{
                $filesErrors++;
                print_r($errors);
            }
        }

        if ($filesErrors == 0){
            echo 'Success';
        }
    }
?>


<form action="" method="POST" enctype="multipart/form-data">
    <input type="file" name="files[]"> <br/>
    <input type="file" name="files[]"> <br/>
    <input type="file" name="files[]"> <br/>
    <input type="file" name="files[]"> <br/>
    <input type="file" name="files[]" > <br/><br/>
    <input type="submit"/>
</form>