I would have thought a recurring problem demands more of an investigation.
Simply uninstalling and re-installing may make it go away for (another) week, but didn't really address the underlying problem that is giving you the false addresses that happen at roughly the same time several days in a row, a couple of weeks in a row.
Perhaps the dipswitches controlling your additional dusk addresses (primary address +5,6,7 &
are incorrectly set - The PR511 with all the dusk settings active will happily send O7, O8, O9 and O10 when the primary unit detects dusk.
I have a much simpler fix that will make it go away - just stop checking the activity monitor. Since you have no modules on those addresses it's really not affecting your setup.
One would hope that if (when) this happens again next month you'll look at the root problem and respond to the people who try to help BEFORE you simply 'bomb' the thing.