Good Explanation! It makes sense now. I kept seeing people post in another chat that we are suppose to get credit for each one whether it’s an apt of freestanding and for the life of me I was wondering why mines wouldn’t change. I still wonder why they came up with a certain number though it’s at an apt.
Well, according to the Nat'l Agreement, it IS supposed to be credit for EACH door opened. from Article 9 ;
4. Centralized Delivery
Centralized delivery,
for the purpose of establishing a
rural time allowance, is defined as any mail-receiving
unit where the carrier has access to more than one
individual customer’s receptacle by opening
only one
door, such as Cluster Box Units, Apartment
Receptacles, Delivery Centers, Postal Centers,
Mailrooms, etc
However, through some sort of "formula" determined by the engineers , this IS NOT the case. There is quite a bit of info that the average carrier at large has not seen , will not see, and will never see and this is the way BOTH The NRLCA and The PO want it to be. In my attachment, you'll see just how the "formula" is calculated and you'll also take notice of just how much time , in key turns alone, this particular route is being shorted EACH WEEK due to the mathematically reduced number of doors / key turns.
From The Guide ;
Central Deliveries are those where the carrier dismounts to deliver to one or
more Centralized Units (such as apartment clusters or other centralized
deliveries) containing multiple individual boxes. In addition to applying
Standards S119, S120, or S121 as appropriate, for each individual box, the route
is credited with 0.3803 minutes per day
(2.2818 minutes per week) for each
Central Unit which the carrier must unlock, open, close and relock the door.
In the attachment, the route actually has 16 units but is "credited" with 9. This is shorting the route 7 doors at 2.2818 minutes per week. This is almost 16 minutes each week ( 15.9726 minutes ) 
