Product Version on import

Hi,

We are importing product xml from Test to Production environment by using product workspace,

When Importing to the target environment we are executing following steps,
a. Go to "Workspace Projects",
b. Create New, set name
c. Click Menu in Workspace Projects then click "Import Contents"
d. On the pop up, then choose the location/path of XML to be loaded
e. After Loading, we click the "Release All"

We are having following product structure,

Root Product

                -- Child Product 1

                -- Child Product 2

                -- Child Product 3

When we import product in Production environment for first time all the child products and root product are having version as 1.