product and his options on backend

hi,
i have some trouble to understand the order of multiples product with options.

In the backend I can't recognize the options of the main product if I have an order with two or more products.

Instead in the frontend they are grouped.

How can I solve ?

so if i have to change something i don't know which option i have to edit for the main product.

To solve this is it possible to put on the cart only one main product with options ?

I tried with "Maximum number of items in the cart" but the options are counted as product.

any other smart solution ?

I tried with limit as in the picture,
but it seems that users can still put more than one product on the cart ...

what's wrong ?