I think the fact that a level 7, 4 hour old character achieved more ImmXP than you have in your previous 10 characters combined proves that there is no issue with the doling out of ImmXP. You just need to LRN2RP. The below is purely MERIT based and NOTHING to do with who you know or, more importantly, who knows you. =) =)

PREMIUM HISTORY FOR Gilversplitz
Wed Dec 6 12:25:53 2017 by 'An Immortal' at level 7 (4 hrs):
An Immortal added 500 exp for: For a long and impromptu quest involving his beagle.

Experience from Immortals = 9230