Perhaps the station was only given a verbal or non-published warning at that time (in 2008) by the agents on the case-- and still being on the air at this time, the FCC is finally delivering/publishing an NOUO in preparation for further "enforcement action" on this station.... to get their previous visit "on the books", so to speak. (They have been known in the past to have delivered only verbal or non-published warnings in certain cases.)
It does seem to be their standard procedure now to deliver a Notice of Unlicensed Operation first, reserving the levying of fines ("Notice of Apparent Liability") for further violations after the warning has been given.