Schema migration error

If I create schema like this:
Schema::create('clinic', function(Blueprint $table){
			$table->increments('id');
			$table->integer('user_id');
			$table->string('name', 100);
			$table->timestamps();
		});

and run migration I get wrong database with two 'id' column.  One is integer autoincrement and second 'id' is last and is timestamp type column.