Why movement type 653 checked deactivate qm inspection?

Dear Expert,

I would like to create a new sales return movement type 953 copy from 653 without creating inspection lot.

I check the IMG setting of movement 653, and find deactivate QM inspection already checked.

When i post the return stock with 953 or 653, the system still create a return inspection lot for inspection type 06.

The help say if you check the deactivate QM inspection then there is no inspection lot create, but it's not true.

Could anyone tell me why?

thanks!

BR

John.