When creating an upgrade package and a user is provisioned for layer version X, on a client machine the layer will go to 100% and disabled.
in the _AC logs you will see messages that look like the following:
ppInstallation,AppInstallation::SvsInterface::activateSvsPackage#1107| Unable to activate layer 5a89ada2-0f4a-47c2-b79c-d8aa9d9279a1, error: 1068 2015-12-16 07:42:35 ERROR  AppInstallXPF,AppInstallXPF::XpfInstallUninsMgr::performSWVLayerInstall#668| Error during installation: AppInstallXPF::StreamedSwvInterface::activate, Failed to activate layer, FSL2 error code: 1068 2015-12-16 07:42:35 INFO  GuiHandler,CEventHandler::notifyDirectoryChange#692| Path: C:\fslrdr\xseb0- 541, notification: 16 2015-12-16 07:42:35 INFO  GuiHandler,CEventHandler::notifyDirectoryChange#692| Path: C:\fslrdr\xseb0- 541, notification: 16
The layers edit flag was set to enabled after compiling in Virtual Composer.
Symantec is aware of this issue and has resolved it with 7.5.SP1 HF8