I've been tinkering with Yahoo Pipes and the Amazon E-Commerce Service (ECS) SDK to retrieve my wishlist.

The problem is that although I can get all the items on my wishlist just fine, it seems to include items that I've deleted too.

Has anyone else used this API and noticed this? Is there a way around it?

UPDATE:

Requested additional information in comments...

Here is the URL I use to fetch the wishlist XML:

http://webservices.amazon.co.uk/onca/xml?SubscriptionId=[my subs id]&Service=AWSECommerceService&ResponseGroup=ListItems&ProductPage=1&ProductGroup=Book&Operation=ListLookup&ListType=WishList&ListId=[my list id]

And here is the relevant part of the XML response:

<ListId>[my list id]</ListId>
<ListName>Wishlist</ListName>
<TotalItems>132</TotalItems>
<TotalPages>14</TotalPages>
<ListItem>
    <ListItemId>EPIE5559HKT391</ListItemId>
    <DateAdded>2003-11-17</DateAdded>
    <QuantityDesired>1</QuantityDesired>
    <QuantityReceived>0</QuantityReceived>
    <Item>
        <ASIN>5557205521</ASIN>
        <ItemAttributes>
            <Title>Horton hears a who</Title>
        </ItemAttributes>
    </Item>
</ListItem>
...

The rest of the XML is just either more list items like that, or information about the request at the top of the response.