Firstly thank you so much for playing,
Renown is tied into other factors as well including fallen heroes.
I've done a small rework that will update with a patch later that raises the cap and gives a little headroom to play with, it add a couple of other ways to gain renown but stops using the fallen as a currency of which to keep topping up.
Your frustrations have been heard and the hard cap vs the headroom needed to have a bit more flexibility.
(if you still have that save it will resolve the new conditions and should give you a new renown score
See you in the halls!