Have you physically seen 2 accounts each when you buy a new report or order your report from the CRA(s)? Or are you basing this off your ScoreWatch alerts?
If the latter, know that you don't have two of the same account. If you go into SW settings, by default you'll see a setting selected on "Y" for "Yes" for SW to provide alerts if your balance exceeds $x. And you'll see a second setting selected on Y for alerts if your balance exceeds x%. I think the default is $5 and 5%, but I can't remember. In any case, if your CC balance increases by both $x and x%, you'll get a double alert for the same account. If annoying, select one for N for No and the double alerts will go away.
I've seen that from day 1 of my subscription to Score Watch. No big deal. The duplication is merely a display error; it does not have any effect on your credit history or score.