Inclusive row security on item ledger and item availability

I would like to consult you on the inclusive row security on item ledger and item availability..

I have revised current setup as :

objective:

cbyee only able to access to 00101 for MCU 101FIM to 101WHS

*ALL MCU 101FIM 101WHS Y Y Y Y

*ALL CO 00101 00101 Y Y Y Y

*ALL KCO 00101 00101 Y Y Y Y

*ALL KCOO *BLANKS *BLANKS Y Y Y Y (revised)

F41001 MCU ALL ALL Y Y Y Y (newly added)

F41001 MCU 101FIM 101WHS Y Y Y Y (newly added)

output:

After revising, it did give no error in P41202 and P4111..

My questions:

1.Why do i need to add the 2 lines of F41001 ?