Maybe they are just automated because the event isn’t worth devoting any resources to, and the system allows repeats based on level?
But if this is intentional… I have no idea why they do this. It isn’t even really “slowing me down” to have Urska/enrage teams twice, but it does sort of counter Stonehammer, a mythic you already have very little content where you’d maybe want to use him. It didn’t really “slow me down” to not have Bunni’Nog on Pan’s Vale, I’d have had to change my team for others anyways, you just don’t get the satisfaction of even getting a chance to use it at the one thing it might be good at. Troops that are already hyper niche don’t need to have less content where you might want to use them for a bit.
Oh well, guess I’ll continue to ignore these 99% of the time.