Using Manage Planning Level Profile misses customers from Demand plan.

Summary:

we are creating planning level profile and attaching it to a plan. planning level profile consists of customer hierarchy with 2 levels.

Customer site and Customer.

it contains around 15 key customers and rest are mapped to all others.

e.g:

After plan run, we find 6 of 15 key customers missing from plan.

1.) why is such scenario occurring.?

2.) what is the solution.?

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