If you use Fixed Reorder Qty. reordering policy, NAV uses the quantity specified in the Reorder Quantity field as the standard lot size. NAV may adjust this quantity to meet additional requirements or the specified inventory level.
You need to set Reorder Quantity instead Minimum Order Quantity. Here, you can specify a standard quantity to be used for all order proposals and NAV will use this quantity as the minimum stock.
If you want to correctly set this, you need to fill:
-100 pcs in Reorder Quantity
-e.g. 10 pcs (must be less of Reorder Quantity) in Reorder Point