Originally Posted by WineCountryUA

At least two possibilities
1) the linking did not work due to account differences
2) the individual did not "link" accounts but did one of the other activities, such transfered miles -- which does not do the linking. Been a few that have reported that confusion

Best to try
http://www.united.com/combinemyactivity
or
http://www.continental.com/combinemyactivity

and see it it does something or states "ACCOUNTS ALREADY REGISTERED:"

if the later and still not status matched, call and ask for the integration team