Regardless of what is suggested 0 is not the optimal power, the optimal power is between 10 and -6, there will be no Benefit whatsoever from moving levels down a couple of points.
I can only suggest that if you feel there is an issues with your service to give us a call and we can have a technician find the true cause but I can guarantee your power levels are fine.
In terms of the post errors than they are perfectly acceptable. There are only a few hundred which is very minimal. I would only consider it to be a problem once they are in their thousands and over a shortish period of time. If your hub has been online for a while and you’ve only got a couple of hundred post errors then that is nothing to worry about and you really should t see an impact.
Errors are caused by noise which is most likely out of your control and you can check all of your connections are nice and tight. Loose connections can cause ingress.
if you would like me to help you out with a visit from a technician please let me know.
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