Say you are already a 7 Stars. So you get one trip with $1200 airfare and $500 food credit.
Then you hit high diamond (80k tiers) and now you've earned another $750 airfare trip.
Lets say you don't take that $750 trip yet, and then hit Seven Stars again, renewing it.
You get another $1200 airfare + $500 food trip, but what about the High Diamond trip. Does that get superseded?
And what if you do use the High Diamond trip before hitting 7 Stars again? Can you then take your 7 Stars 2nd trip also?
Nobody at Total Rewards can answer this.