procurement type in "Additional data for MRP element"

hello my dear gurus!

I have a situation I do not know how to solve it. We run a LTP and after run MS01 the BOM is not exploted. I do not see any dependent requirements for the components. The difference I noticed is when I doubled clicked on any plan order, when the Additional data for MRP element pop up, the procurement type is "F", for me is logical the systems does not explode to its components, but if I check this material in Material Master, MRP2, it is Procurement type "E". . . .

why they are different? what did we do wrong?

I appreciate a lot in advance your guidance in this matter . .