RVN transaction Tax with Exodus ???

question about RVN transactions initiated from exodus wallet…

i sent a test transaction of 22 RVN from Exodus wallet (miner wallet) to my Raven Core wallet.

Raven Core wallet got the 22 RVN tokens – and Exodus UI says it sent 22 – but it actually sent 30.
22 RVN went to my Raven Core Wallet and 8 RVN went to another address ? (no idea what it is)
Does anyone know why Exodus sent an extra 8 RVN to a random unused wallet?
is this an Exodus transaction tax or something?