It takes a little while for it to correct itself. I still have my blue reporting as two separate accounts but dates on both have been updated so on EQ it looks like I have four AMEX accounts instead of three. I left that alone. 
EDIT to add: as of my last report June 2009, the blue corrected itself. Now reporting correctly.
EX took me 5 months before it was corrected. And that was 3 disputes and constant calls to AMEX credit bureau reporting dept. Each continually blamed the other. AMEX said it was because of an AU card that would still report as the original date opened. This was BS, the AU card had long since been closed. Anyway, I was told by AMEX that they recently started reporting each card as a separate account number so your problem should clear up faster.
Give it 60 days then check your actual reports. I have CCT and their reporting of changes such as this are not that good to say the least. They dont seem to be that good in matching up the account number scrambling. I have quiet a few accounts printing in different places. What can you do, its cheap and its a daily puller. Sure wish truecredit would bring back their daily pull service again.
For me, the re-aging was worth every annoying phone call.