Correctables themselves aren't a problem but they are indicative of a problem such as the super high power levels you have. 20dBmV is crazy high! If mine goes above 10 I generally start calling people. LOL
The standard range is -15 to +15 and you are already at 20 so as the tech says, get someone out there to fix that sucker (even though you apparently aren't having trouble with it). When the summer comes it will only get worse.
In this case the errors themselves aren't the issue, but are a symptom of a signal issue. Your power levels on downstream and upstream are way off, your receive is 20 and your transmit is 30 and your SNR is a bit low at 34dB. You should been within -10 to 10 on the downstream and ~39-49 on the upstream. SNR 36-41dB(typical seen) I'd say get a tech asap!
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