You appear to have found a solution to your 1st play problem in http://forums.adobe.com/thread/894758
>thought as long as I only have one audio track, it wouldn't matter. That is not the case, I presume
You presume correctly... the Premiere Pro export preset of MPEG2-DVD is designed specifically for when you want to export to... well... create a DVD
The tutorial list in message #3 http://forums.adobe.com/message/2276578 may help