I've made a normal HTML form which when submitted, sends information to another page and that page processes the data and adds it to the database. But for some reason, if I refresh the 1st page which contains the form, an entry is being made into the database even though I can't see any reason for it to do so.

This is the code for the form:

```
<?php $owner = $_GET['user']; ?>

    <h2 class="dotted"><?php _e('Add feedback for user','appthemes'); echo " - ".$owner;?></h2>

        <form id='feedback' action='http://www.example.co.uk/add-feedback-response/?user=<?php echo $owner; ?>' method='POST' accept-charset='UTF-8'>
        <fieldset >

        <b>Your Username:</b> <?php echo $current_user->user_login; ?><br/><br/>

        <b>Rating: </b>
        <input type="radio" name="rating" value="positive" /> Positive
        <input type="radio" name="rating" value="neutral" /> Neutral
        <input type="radio" name="rating" value="negative" /> Negative<br/><br/>

        <label for='item' ><b>Item bought:</b></label>
        <input type="text" name='item' id='item' maxlength="500"/><br/><br/>

        <label for='comment' ><b>Comment:</b></label>
        <textarea name='comment' id='comment' maxlength="2500"></textarea><br/><br/>

        <input type="submit" id="submit-button" value="Submit Feedback" />

        </fieldset>
        </form>

```

Is there something I'm missing? Thanks for any help