Moving person with multiple opportunities (at different stages) through the lifecycle model

We have two product lines - one enterprise and the second more transactional. I have two separate models. On the transactional model, a majority of sales are from current customers. When a customers has a new opportunity, should I move that person back to the SQL (oppty) stage or leave at Closed Won?

If I leave at Closed Won, will the new purchase and Closed Won oppty be included in program/revenue attribution reporting if the person doesn't "move" the Closed Won stage?

Thanks,

Sherin