Your post there makes it sound like if you have this:
Jan 15 2020- referral 1- you get 1k miles that will expire July 15, 2020
June 15 2020- referal 2- you get 1k miles that will expire Dec 15 2020
(so far consistent with your attached and the website)
But you seem to be saying (but I'm not seeing that in what you cited)
July 15 2020- BOTH sets of miles expire?
Where are you getting that from?
Idk this is where it sounds confusing to me. It says if all the miles are used before the 6 months than the new ones reset the 6 months. So if you make a new referral and don’t use any do they all disappear if you don’t use any of them?