Why I'm viewing different quantity for the selected product stock adjustment.
Solution : Firstly, user will be needing to validate during the stock adjustment creation if the User has selected a particular location for the SKU in which user is performing the stock adjustment. If yes user will be only performing the stock adjustment for that particular location.
Let's assume, SKU001 is currently in two different location location A = 100 units location B = 200 units. While creating the stock adjustment user has selected location B for the SKU001. Now user will be only performing 200 units of stock adjustment and not the total inventory count of location A and location B combined.