Problems with bills

[Pino82]

Hello,

On the orders and invoices appear Articles demo I deleted after installation of prestashop .

Obviously I do not have it added to Carrelo because there are no more , unfortunately I see them automatically entered in orders and invoices .

From what I understand , as I do with testing orders , items are automatically added with code demo_1-2-3-4-5-6-7 .

http://postimg.org/image/iynzao0qv/

When I click on these items prestashop tells me : Item impossible to load ( or not found )

What can I do to eliminate them altogether ?

Thank you.