CTM Forecast Demand (FC) and Stock (CC) supply

Hi Gurus,
We are testing a simple CTM scenario with FC as our Demand and CC as our stock.
We have 2 plants and 1 product.
Material Availability Date is our Demand Prioritization. Both of our demands have the same Date - a month from the current date.
We have Procurement Prioritization set up for both PPMs and Tlanes.
My problem is this:
At both the locations the Supply (CC) is less than the demand (FC). When we run CTM, the first demand signal is taking the stock from the second location - even though there is demand at that location that needs the stock. The first demand signal is not fulfilled and the second is not fulfilled, but we have an unnecessary Purchase Requisition created to partially fulfill the first demand.
Shouldn't CTM ignore the second location as a source of supply since the location has demand against it's existing stock? What can I do to prevent CTM from using stock at a location which has demand of it's own?
thanks in advance,
sarah

Hello Dipankar,
Thank you for your response. I apologize for not answering sooner - I was testing ATP priroritization.
We only have MBDAT as our demand prioritization. I tested with ATP categories but was not able to resolve the issue.
I have noticed that the issue only happens when there are PPMs assigned to the model.
IE:
Model A (all demands are for same date)
LOC A supply 100 units of product X, supply of 30 units of product Z
LOC B supply 100 units of product X, supply of 30 units of product Z
LOC A demand 200 units of product X, demand of 40 units for product Z
LOC B demand 200 units of product X, demand of 40 units for product Z
Tlanes maintained between locations for Product X and Product Z
NO PURCHASE REQS CREATED
Model B (all demands are for same date)
LOC A supply 100 units of product X, supply of 1000 units of product Z
LOC B supply 100 units of product X, supply of 1000 units of product Z
LOC A demand 200 units of product X, demand of 40 units for product Z
LOC B demand 200 units of product X, demand of 40 units for product Z
Tlanes maintained between locations for Product X.
PPM maintained at LOC A to create Product Z (output) from Product X (input)
PURCHASE REQ CREATED FOR PRODUCT X FROM LOC B TO LOC A.
PLANNED ORDER CREATED FOR PRODUCT Y FROM PRODUCT X AT LOC A
I am not able to figure out why the purchase requisition is created when LOC B has demand of its own. I am not able to figure out why the purchase requisition is only created when PPMs are in the model.
Best Regards,
Sarah

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