Sourcing Rule in Minmax planning

I have created a sourcing rule (say SR1) for an item "A" . sourcing rule is buy from and sourcing rule is assigned in assignment set(which is set by profile MRP:Default assignment set) as item+organization combination.

Sourcing rule deatils

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Buy from - Supplier1 - Allocation is 60% - Rank1

Buy from - supplier2 - Allocation is 40% - Rank1.

Now i ran minmax planning for Item A in its organization where sourcing rule SR1 is set up, and minmax planning generates a requistion of 100 qty. Now as per sourcing rule it should generate two requistion.

Requisition1 - 60 qty for Supplier1