As in the UK, we don't really know where this pollster stands. They release weekly polls in the UK which election Twitter influencers promote, which aren't too removed from the results of other pollsters. However who knows whether this is the same operation here.
I couldn't find the poll on the page linked?
Others are questionable, like Beto's one point lead in Texas with too many undecideds. Anyway, Georgia is a pure tossup or Tilt Democratic at best. I still think Warnock is more likely to survive than Kelly, perhaps even CCM.
I couldn't find it either - only the gubernatorial polls. I rank Warnock as safer than Kelly and CCM like you do.