I am not absolutely sure what you are referring to, but let me explain a little bit about "duplicate" names and products.
Firstly, zencart appends a unique incremental ID # to every product you add to the store. This is largely "hidden", but is critical for the system to identify a specific product in the many FUNCTIONS used to compile browser pages, calculate amounts, and keep records of activity. The ID helps the system apply RELATIONAL ACTIVITY in the database, thereby speeding up processes by using RELATIONSHIPS in the tables to "assemble" relevant information from a variety of places, rather than have everything duplicated (or even triplicated).
The customer is seldom aware of this ID, but it can be seen in the browser address bar when you navigate to a product, or in your ADMIN panel, it's usually visible as the left column in a list of variables.
There is the capacity to append a SKU/Product Code/Model Number/Part Number to every product you add, and this should ALSO be unique. A SKU lives and dies with a unique product, so it should not be duplicated or re-used - even when a product is discontinued and a new one takes its place.
I make a habit of using this feature, and I use it rigorously, following a logical "convention", as would be the case in any formal retail environment.
Zencart can
- DUPLICATE products and
- it can LINK a SINGLE PRODUCT across two or more categories.
Whether you DUPLICATE (clone or copy) a product (so that there is MORE than one of the same product), or whether you LINK one product across several categories, depends largely on what you are trying to achieve.
A LINKED product is housed and managed in a MASTER CATEGORY. You can select which category you'd like to be its MASTER category. This is important, because EDITS to the product must be made to the data located in its MASTER category.
DUPLICATED products can be identical in all respects - even their SKU, and can be edited independently of each other. This is useful if you have a category that applies for a specific purpose and you want the product to be priced or described differently from its duplicate somewhere else.
If you explain in more detail (now that you've read the above) perhaps we can advise what mechanism is the more appropriate one for you.