in general the "Uncorrectables" should be a pretty low value (make sure you clear the counters as they could be lifetime or since last clear). so it's probably signal related somewhere. Maybe in your condo or maybe outside.
i had a coax booster amp (installed by a cox tech years ago) where the AC adaptor was unplugged by my cat and that caused problems, for instance. Or an abandoned splitter in the crawlspace from the previous house owner, etc.
and there have also been problems in the telephone poles outside the house which could only be fixed by the cox guys.
