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I'm guessing Amex looked at their most recent SP on file instead of doing a new SP when you requested the CLI. If that is the case, I would for sure recon.
I agree with @Anonymous on them using the last SP report.
How often do they SP?
I would wait another month and try again. Unless you need the CLI right away, I'd wait as these things tend to work themselves out. And as an FYI, I've gotten a 3x CLI with Amex and my discharged BK13 is still alive and well on my reports and will continue to be for another year or so.
I agree with some of the above posts - it seems strange that alot of people who have rebuilt from more recent BKs have had success with Amex and yet they tell you that your older BK is a dealbreaker. How long have you have the Amex and what is your CL vs your income? If your relationship with Amex is young - that may have more to do with it than an old BK...................