DoL XP Boost

[Shadygrove]

Any time you play a DoW/DoM class/job that is not your highest level DoW/DoM job you get an XP bonus for monsters you kill, leve-quest rewards, and FATEs.
This bonus is 100% if your current class is level 1-59, and 50% for level 60+.

No such bonus exists for DoH/DoL classes.

My alt's highest levels are BOT and MIN 65. She is getting the 50% bonus on BRD 62, her highest combat job.

Where is it coming from?