I just wondered why they have the Max tasks per day set to 1 but receive more than 1 per day. I think reducing Max tasks per day is the right way to handle such hosts, but it seems not to work as intended. I clicked through some accounts and found that both hosts are involved in almost every longlasting CPU/LLR WU.
Both hosts have over 11k invalid tasks with calculation errors dating back to February. None of them has a single valid task in the list. As far as I can see, Primegrid responds by reducing Max tasks per day to 1 for most of the applications. Nevertheless, the actual Number of tasks today is larger than 1.