pamin002,
Yes they are backed up. I finally called and spoke with someone there this past week. My optomCAS application has been done since the end of July, and my UHCO supplemental was completed by the middle of august... and I hadn't heard anything from them regarding even receiving my full application, and if anything was missing. They apologized, and explained to me that they had a problem with their downloads and whatnot from optomCAS, so that, yes, they are a bit behind. They are trying to get our applications into the committee for reviews as fast as possible, but they admit that they are backed up and working on it. I know how you feel, because it's very difficult for me to try and wait patiently in this situation, but they said not to be worried, and that they are doing what they can.
Hope this helps... or at least provides a little assurance that you are not alone in this!