iMovie DVD audio stops in middle?

Imported a one hour video into iMovie 11 from our new JVC video camera then exported it to iDVD.

It made the chapters into menu scenes as expected.

However, in the last scene, the audio stops in the middle?

I don't think there is a secret make the audio stop in the middle of a clip setting I could have accidently clicked on?

I've used the advanced menu to delete and recreate the encoding with no luck.

I've exported an image file and used Disk Utility to burn it with no success.

I've gone back to iMovie and shared it to iDVD again with no luck.

The sound is there in iMovie and iDVD but not on the disc using DVD Player?

On top of my frustration, everything I try takes an hour or more of waiting...

Who removed export selected clip from iMovie?

Please don't make me have to go use a PC. I thought my new laptop was an upgrade?

I understand that DVDs are a thing of the past now--just fix the bugs, "one more build!"

iDVD used to be fun like HyperCard back in the day and now it is embarassing to see the apple logo on the menu screen as the audio stops and everyone grabs the remote to check the volume and blame the sound system. It has now become a disappointing waste of time--I should just go watch YouTube videos of laughing babies and cats...