I called Xbox Live Support back today to check on the status of the my support call from about a week ago. Wow, what a difference a competent support rep makes! I spoke with someone who was definitely a native english speaker, and after she reviewed the notes on my issue she informed me there was an easy solution that could be tried. Unfortunately she recommended that I did NOT try it right now because Xbox Live is in the middle of a 4 day long upgrade and is working sporadicly at the moment.
The steps to fix the problem were to
1) Delete my XBox Live Gamer Tag, but select, "Profile Only". This part is VERY important, otherwise you may delete all of your saved games. Not good!.
2) Go to Account Recovery (from Market Place) and select "Recover Profile".
3) Got to Account Management -> Download History and re-download all purchased content.
The support rep mentioned that this may not fix ALL of the problems but would hopefuly correct the majority of the issues I'm having. Once Xbox Live is back to normal I will attempt the fix above and report back with my results.
Happy New Year!
Brian