You're current configuration has your systems configured for notification updates AND background updates, so updates will occur via either method.
SilentAutoUpdateEnable=1 = background updates enabled
AutoUpdateDisable=0 = notification updates enabled.
Unless you are hosting the background update resources locally, there is no way to disable notification updates and have only backround updates enabled. Information on hosting background update resources locally is available in chapter 3 of the http://wwwimages.adobe.com/www.adobe.com/content/dam/Adobe/en/devnet/flashplayer/pdfs/flas h_player_14_0_admin_guide.pdf.
OK, so there is no way to disable notifications and have aromatic updates short of hosting our own update server in house? That seems kinda crazy... Is there a reference to the return codes written to the verbose log file?
Also, is there a way to force a check/install of the update? The scheduled task does not seem to do anything... Even with Verbose logging set, it just dumps a bunch of codes that seem to repeat and do not tell me anything. I also can not replicate the popup telling me there is an update needed. Is there a place, maybe in the registry or a config file to reset a check bit? Does it only check once a day regardless of when the task runs?