Gallant's Roll, incorrect % listed? Not applying correctly?

Been running test for past the past hour in Whitegate.

SE stated
"11 +20%
Bonus +10% "
-----------------
DEF 401
Testing on rolls 11

DEF 480, Should be 401*1.2= 481.2 -1.2
With PLD
DEF 520 Should be 401*1.3= 521.3 -1.3
---------------------
Base with Defender DEF 501
Testing on rolls 11

DEF 581, Should be 501*1.2=601.2 -20.2
With PLD
DEF 620 Should be 501*1.3=651.3 -31.3
++++++++++++

Beside the slight 1.5def avg off, base def math added correctly.
Testing change when Defender is up. It seems the rolls only applies to base DEF (gear only) without buffs.
I did not try with Protect and Atma buffs. But so far, it isnt looking good. If I have some time, I will update new numbers.

1. All known calculations done by the FFXI servers are floored (dropped to the nearest whole number or tenth of a whole number depending on the term) after each step.

2. PLD roll probably stacks additively with defender, not multiplicitively.

3. I agree, PLD roll sucks.

"1. All known calculations done by the FFXI servers are floored (dropped to the nearest whole number or tenth of a whole number depending on the term) after each step." -ya that is a given

"2. PLD roll probably stacks additively with defender, not multiplicative."- Correct, I didn't think about it last night, but math wise, it did add up...

Base DEF 401 Defender 25% + Roll at 20% = 401*1.45 or 1.55 for bonus... Which ya... blows...
Hopefully someone from Dev team will notice this and change it, because so far it really does not help with anything.

Btw if I recall, so far all other cor's rolls are additionally......not multiplicative:p

For reference ~~

Fractional factor:
The percent increase is almost certainly in units of /256 (but maybe /128) based on other info. So +20% is 51/256 (0.19921875) and +30% is 76/256 (0.296875).

401 * (1 + 51/256) = 480.88671875 => 480 (match)
401 * (1 + 76/256) = 520.046875 => 520 (match)

And yes, it's additive with Defender:
401 * (1 + (64+51)/256) = 581.13671875 => 581 (match)
401 * (1 + (64+76)/256) = 620.296875 => 620 (match)