i also try and fix things myself first but there comes a time when you have to just go for the that support you pay for!
I have had to speak to symantec recently and they always go directly into a webex and they really do seem to know their way around the products and where to look for little things.
I keep getting emails about backup jobs saying the job was cancelled by the user when it blatantly wasn't, and the drive suddenly deciding its offline towards the end of a job but then it works fine for the next job running immediately after it etc.
Try using enterprise vault, that takes things to a whole new level, you need a degree to install, use and troubleshoot it!