WAV File Noise Reduction Removal Undone in Multi-track

1. I recorded a WAV file in Adobe Audition
2. I removed the breathing noise (Effects/Noise Reduction/Noise Capture/Apply)
3. I confirmed the sound was removed by replaying the WAV file.
4. I saved the WAV File.
5. I exported it and renamed it, just to be on the safe side to make sure it was really removed.
6. I played the exported file in my Windows default audio player and confirmed the breathing noise was removed.
7. I opened Adobe Audition and created a new Multi-Track / Podcast template
8. I opened the exported WAV file in my multi-track session.
9. I pulled the exported WAV file into the host section of the podcast. It LOOKS like the breathing is gone because the audio line is completely flat between sentences. But, when I play it...
10. The breathing is back!!!  The sounds that I removed weren't REALLY removed? They were still included in the file after I exported it?

I called tech support. They said, "It happens sometimes."

Can anyone tell me what I'm doing wrong so that this doesn't happen sometimes?