Audition MP3's "duration" error in Mac Finder

Hi People,

I'm getting display errors in Mac's "finder" (file explorer) and display render errors in Quicktime as well, for pretty much all MP3's I master in Audition.

First of all, listed in the Finder, most all time "Duration" entries are wrong.  Often there's 20 seconds or more of "silence" added to the end of the recording - which is not part of the actual file, when opened in an audio editing program (like Adobe Audition).  Some of the timings are way off, like an 8 minute song listed as 45 minutes.

Then when these files are opened in Quicktime, there are further discrepancies. For the 8 minute song listed above (noted as 45 minutes in Finder), Quicktime displays total length as 9:02, adding a full minute of silent play at the end of the 8 minutes of true audio. The WAV or AIFF files, before converted, show the correct duration in Finder, and as well are rendered accurately in Quicktime.

Thanks for any suggestions as to why this might be happening.  Not sure if it's an Apple or Adobe issue.