Order Process messed up

[J.Sahu]

I don't know what happened but I'm going through terrible situation using PresataShop. My Backoffice ordering section is totally messed. I'm getting two extra products in each order and three payment approvals. Now I can't even decide what my customer has ordered. I thing this is something related with the authorize.net module but I'm not sure. I'm getting many problems using Prestashop. Slow loading, server error, database conection errors etc.   I'm giving some screen shots for better understanding. Please someone help me. 

 

One Payment is accepted and it's showing that three payment has been accepted.

 

This is the Product details and price. I can't understand it.

Hope This will help you undrestand

[J.Sahu]

This is is automatically solved after deactivating the cross selling module. I thought that something was related with the authorize.net module and cross selling but I'm not sure. Well updated prestashop version, authorize.net module and activated the cross selling module again. Now it's working perfectly right now.