I was rank 3 just entered a scenario went from renown 0 to renown 3 at the very end It dinged me renown 4 but I was only rank 3 still!!!! Once I got out I screen shotted it here it is:
EDIT: HAPPEND AGAIN I WAS RANK 2 JOINED A SCENARIO GOT TO RANK 3 IN SCENARIO AND RR 4 IN SCENARIO! I THINK THIS CAN BE REPEATED!