MRP Type V1 and Special Stock E

I've created material 010119000109 with

MRP type: V1

Reorder point: 10

Lot size: HB

Maximum stock level: 20

Availability check: 01

Un. use Stock=0

If I run the MRP (MD03) the system correctly creates a Purchase Requisition of 20pieces.

The MRP list shows me the unrestricted use stock which is zero

and the purchase requisition of 20pieces

1.Now I create a Sales Order of 25 pieces.

The sales order 3001300068 has an item category (ZTAN) which requires special stock E.

I run the MRP again.

The MRP list shows me:

-unrestricted use stock 0

-purchase requisition of 20 pieces

-the special stock for sales order 3001300068, which is zero

-the customer order requirement of 25pieces

QUESTION 1. Is it possible that the MRP type V1 considers also the special stock E requirements?

I cancel sales order 3001300068

2. Now I create a Sales Order of 25 pieces.

The sales order 3001300069 has an item category (TAN) which requires unrestricted use stock.

I run the MRP again.

The MRP list shows me:

-unrestricted use stock which is zero

-customer order 3001300069 requirement of 25 pieces

-purchase requisition of 35pieces

the calculation is exactly what I want.

Now I convert the Purchase requisition in Purchase Order and post the Goods Receipt.

Now I have enough unrestricted use stock

QUESTION 2. I've tried to create the delivery, the picking, the handling unit, but the material is still in unrestricted use stock

which means anybody can take it and use it for another sales order or consume it.

Is there a way to book 25pieces for my sales order (without posting the good issue)?