real Id on 1 bnet question

[MiRai]

1) RealID whispers end up on account B, someone parked at the AH, even if I send a whisper with my main account A. Any way to solve it so they always end up on account A (apart from using jamba).

Blizzard said the last account to be logged in on that BNet will receive RealID whispers.

2) Is there a possibility to invite a toon on account B to the party on account A, while both share the same bnet account and are on a different realm? (I want to boost a lowbie A with an 85 on a different realm).

Pretty sure someone else did this for boosting. Not entirely sure.