I understand the age of money metric for the most part. (How long a dollar lives in your account before spent)  I've noticed, however, that moving money between accounts that are "on-budget" (Not tracking) negatively impacts the age of money.  

My Question is Why?   Details of what I am doing is below;

Scenario:

A high-interest savings account where I keep my emergency fund, and other savings goals to maximize my interest gain from that money as it's going to sit for >6 months or more.   I budget ~2  months ahead, and when each next month is 100% funded, I make a bulk transfer from checking to savings. 

The transfer is split between the categories as an outflow from checking then inflow to checking.  The Pay-ee is Transfer From xxxx then Transfer To xxxx.

Doing this seems to drop my AoM, but its not consistant. 

Using the YNAB toolkit days of buffering I am >175 days, and I carry very little debt.