We are implementing a stock management, for company who are in Rental business, they rent out goods to the customers for limited number of days and get it back in the stock once the order is fulfilled (Dismantling). 

And if they don't have their own goods to fulfill the customers' requirement they also Cross Hire the products from suppliers and return the goods after predefined days.

Now to accomplish this scenario, we have configured a Route with following configuration :

which will create a picking from Stock to Renting Customer( Customer Location) and the chained picking from Renting Customer -> Stock automatically which is dependent upon the prior picking which is Stock to Renting Customer. (That works fine)

Now main challenge which we are facing is that, they maintain their own stock and cross hiring separately in one warehouse i.e Wh/Stock/Physical Location and Wh/Stock/Cross hire Location and if I am defining two different rules for cross hire and own products with different source locations, 2 pickings are generated with 
1) Physical Products - > Renting Customer

2) Cross hire Products - > Renting Customerand their two related pickings which are 

Note : They don't sale the goods which are acquired for Rental only.