Apparently this was a bug that was "resolved" but it's not been as I keep seeing the same posts come up on my feed from clubs and individuals for weeks/months, even if I've given it kudos.

Activities I'll see twice then never again.

The park run record was broken at my local club and I saw the same post about it every day for two months. 

Now it's happening more and more as I've joined more clubs. Makes me want to leave them. As it's just dull scrolling the exact same content again and again every day.