This is a COmmon problem with CO. CO programs their flight number ranges for valid awards and we see this sort of thing for time to time -- where a flight number is outside what CO has programmed for the range of valid awards, and CO's tables of valid flights are not properly updated.

I've experienced it a COuple times, and we've seen many posts about it.

Unfortunately, CO's culture does not allow for them to make a mistake, there is no real mechanism within the company that a customer can reach to get this COrrected.

You probably should alert CO Insider, and he'll let the correct folks know, thank you for alerting him to this, and probably blame someone other than CO (e.g., NH for not notifying them or something).