The problem doesn't have anything to with KCLT, of course, since the scenery itself doesn't have any effect on the baggage visibility: it would only control the logo used with the parking airline code but, even with no airline code (and KCLT have them), a generic ULD will always appear.
Missing objects without any errors, are usually a result of graphic settings, like bug in video drivers, a problem with the sim graphic settings, or a tweak the shouldn't be used.
Try the same solution explained here, which the user reported it fixed his problem of some objects missing at JFK:
http://www.fsdreamteam.com/forum/index.php/topic,16348.msg116586.html#msg116586