I loved the tea break with the HPR promo in the middle. It was a great idea. It reminds me of one of Klaatu's coffee breaks on Gnu World Order. I'm really sorry that it didn't execute as well as it was planned.

I'm guessing that you did that in audacity, and I'd bet that either one of two things happened. Just guesses, but:

1.) you didn't unlink the tracks before pasting it in, or

2.) you used "truncate silence" before "mix and render" 

The first thing would be pretty obvious, so it probably wasn't that. The second would have removed the silence somewhere off screen if you had been zoomed in enough. If it was neither of those two things, I'd be really interested to find out what you think caused it.

For anyone using audacity, one suggestion is to use the high speed playback and listen to the whole track before your final save and export. If it's a track that you edited, then listening to it at 2X is fairly easy to do, even if you aren't used to listening to audio at that speed, because you're used to listening to that track.