Quote Originally Posted by Sygmaelle View Post
There's something more about the dots and I think I kinda figured why FFXIV App is actually not able to track them down "properly", and instead doin a physical damage interpretation.
The parsers can not properly determine DOT damage because the combat logs do not include DOT damage, they only show that the Debuff has been applied. The damage is not actually recorded thus parsers have to estimate damage done.

I don't believe this is a coincidence, it is tied to the way DOTs tick (explained in my post above). The actual damage is done every 3 seconds on the server side when/if it registers the applied Debuff.