1) Welcome back to the Party!
2) You've obviously been here a while, so I'll remind you of our newbie suggestions in case you have forgotten:
when you post, please post your entire configuration including (but not limited to) your installation method and vicidial version with build.
this IS a requirement for posting along with reading the stickies (at the top of each forum) and the manager's manual (available on EFLO.net, both free and paid versions)
You should also post: Asterisk version, telephony hardware (model number is helpful here), cluster information if you have one, and whether any other software is installed in the box. If your installation method is "from scratch" you must post your operating system and should also post the .iso version from which you installed your original operating system. If your installation is "Hosted" list the site name of the host.
If this is a "Cloud" or "Virtual" server, please note the technology involved along with the version of that techology (ie: VMware Server Version 2.0.2). If it is not, merely stating the Motherboard model # and CPU would be helpful.
Similar to This:
Vicibox X.X from .iso | Vicidial X.X.X-XXX Build XXXXXX-XXXX | Asterisk X.X.X | Single Server | No Digium/Sangoma Hardware | No Extra Software After Installation | Intel DG35EC | Core2Quad Q6600
3) Consider upgrading if you are not at version 2.4 (we are presently using 2.6 in all our new client boxes, it's quite stable even if it has not been released!)
4) You should try some testing in a controlled test campaign. Find out how a system release call is calculated by making 15 calls to your own cell phone (and perhaps a few to a number you know is disconnected ...) and treated specific calls in certain ways. VM/No Answer/Answer but hang up ... etc. Then you will have an idea of what causes which result in the report.
5) If you want more information, you should list the specific URL and then the section/field of the data you are questioning on each report. You may even perform a google search on that specific technical information and find a surprise that someone else has asked /answered this question before. If not, of course, post it here and the question/answer will then be available for the next guy when he looks!