Deleting items from shop

[hippooflove]

Hi

I am probably being a bit dense here but.

When you delete an item from your shop, why does it keep showing up on Google webmaster tools as Crawl error . not found.

Is there something else I should do. I am showing 150 pages listed but only 51 indexed. I am getting things like

http://www.realfans.org.uk/product.php?id_product=76 as a 404 error. The same product is listed on my site as

http://www.realfans.org.uk/wimbledon-tennis/76-the-championships-wimbledon-2010.html. I do have canonical set as on.

can any one tell me how to sort this out. it is driving me nuts.

thanks in anticipation

Barry