I applied for the BA card today (I had just been approved for the CO account last week). I called the 888 number and I was told the app. was declined because I just opened a CO account last week. She told me that you can only open one account in 6 months. The agent I spoke to earlier (before applying) had told me that I could apply for another account eventhough I was approved for the CO account last week. The agent (the one who told me my app was declined) said one option would be to close the CO acct and open the BA acct.
Interesting point - the CO app pulled from Transunion and the BA acct pulled from Experian.