Potential System, halp

This post confused me:::

Levels 1~30: Rare = 1%, Epic = 2%, Unique = 3%
Levels 31~70: Rare = 2%, Epic = 4%, Unique = 6%
Levels 71+: Rare = 3%, Epic = 6%, Unique = 9%

How is it possible that a lvl 1-30 equip only adds 3% yet this image shows a lvl 30 dagger with +6%? This is from Spadows blog. Might be an earlier test server version?

/kill bad picture

after taking a look at some of the data... there are 20 different level ranks, starting with 1, not 0. i would guess each rank covers a 10 level section, which implies starting with lvl 0-9 items for rank 1.
-> 0-29 give 1/2/3%
-> 30-69 give 2/4/6%
-> 70-119 give 3/6/9%
-> 120-199 give 4/8/12%

rank 20 may include lvl200 items for the seemingly innocuous reason that 10 is not an integer power of 2...

thankfully i have a free lvl120 shield

this post