Big thing that needs to be done is what has been said above -- make sure that your names actually match!

I got preCheck years ago when it was first launched as a PM; however, over the years I NEVER got the wondrous "triple beep." Only this year has it started; and I note the change happened immediately upon making a change to my SM Profile. It seems that someone my SM Profile had me listed as "FIRSTNAME MIDDLE NAME" / MIDDLENAME / LASTNAME in each field, with the first and middle listed in the same field that first section with the middle name repeated in the middle name field. It took many, many calls to DL IT to get it fixed, but once my name was corrected to FIRSTNAME / MIDDLENAME / LASTNAME all in separate fields, I have gotten the "triple beep" every single time that I have gone through security...

And the kicker is, I was a mere FO at the time -- alas, not as much travel this year dropped me down to a lowly FO, but then this July I got notice from AMEX that due to an AMEX SNAFU, I was bumped up to Gold for the remainder of the term ... but that is an entirely different happy story