"Order Now" button behaviour?

[fxchain]

Hello,

 

Can anyone tell me why sometimes "Order Now" takes me to the product detail page, and sometimes to the shopping cart dirrectly?

 

Thanks

[fxchain]

Maybe I wasn?t clear enough.

 

Let's say I am in the "CD Drives" category. I have a listing of all my CD Drives products. When I click on "buy now" or "order now", I sometimes end up in the product detail page, and sometimes to the shopping cart containing that product directly.

 

How can I prevent that and have it go the product page as opposed to the shopping cart

 

Thank you for any reply.

 

 

Francois