Not every sale is found in my goals. Why?

On 'funnel visualisation' in google analytics I see:
85 cart
17 checkout
17 review
17 complete

1 from the 17 is from the 2nd july.

But I sell 3 items on the 2nd july.

Also the ecommerce module in google analytics only see one selled item.

I don´t see a logic until now, which is included/excluded.
I use the old google analytics JS (urchin.js)

Jurgen
http://www.iGadgets.be