MacOS – Mavericks Server – nothing enabled, but services still running and logging messages

I have a Mavericks server with ALL services disabled in Server.app in an attempt to figure out what's causing a huge number of log messages. When I check to see what services are running, I see the output at the end of this question.

It implies that the Wiki server (com.apple.collabd), the Xcode server (com.apple.xcs* and com.apple.servermgr.xcode.*), the calendar server (org.calendarserver.*), Profile Manager (com.apple.DeviceManagement.*) and others are all running, or at least parts of them are running.

The main concern is thousands of messages per minute that look like this:

Jan 18 02:59:25 domain.com collabd[84733]: [CSODService.m:78 f0a3000 +0ms] Failed to convert user externalID servermgr_xcode to uuid_t for membership check
Jan 18 02:59:25 --- last message repeated 1 time ---
Jan 18 02:59:25 domain.com serveradmin[44306]: [XcodeRequestHandler+DeviceSupport.m:183 73552310 +0ms] Filtering device because it does not have a serial number (e.g. mac or simulator device)
Jan 18 02:59:25 domain.com collabd[84733]: [CSODService.m:78 f0a3000 +0ms] Failed to convert user externalID servermgr_xcode to uuid_t for membership check
Jan 18 02:59:25 --- last message repeated 1 time ---
Jan 18 02:59:25 domain.com serveradmin[44306]: [XcodeRequestHandler+DeviceSupport.m:183 73552310 +0ms] Filtering device because it does not have a serial number (e.g. mac or simulator device)

These appear to be from the disabled Wiki and Xcode services. They get annoying and also cause excessive log file I/O, not to mention other effects of running services that aren't needed or wanted.

My question is threefold:

1. Why are these running if they're disabled in Server.app?
2. Is there a thorough list of server processes and descriptions, preferably provided by Apple?
3. How do I disable them, and which ones are critical to keep running?

I'm specifically looking at ones like SCEPHelper for which there is no manpage and doesn't seem to have any description online. Certain ones, like apspd, are used for server push notifications and so should stay running. I'm mainly concerned with which ones must stay running for things like remote administration. I've already tried serveradmin stop X for the Xcode and calendar services, and although I can stop and start them that way, those few stray services still stay running.

Also, a bonus question: where is the manpage or help document for serverctl?

Disabled and enabled services shown here:

$ sudo serverctl list
{
    disabledServices =     (
        "com.apple.AccountsConfigService",
        "com.apple.afctl",
        "com.apple.AssetCache",
        "com.apple.collabd.expire",
        "com.apple.collabd.notifications",
        "com.apple.collabd.preview",
        "com.apple.collabd.quicklook",
        "com.apple.collabd.scm_poller",
        "com.apple.collabd.stats",
        "com.apple.DeviceManagement.dmrunnerd",
        "com.apple.DeviceManagement.php-fpm",
        "com.apple.ftpserver",
        "com.apple.list_server_mgr",
        "com.apple.mail_exclusion",
        "com.apple.mail_status_init",
        "com.apple.mail_status_periodic",
        "com.apple.ppp.l2tp",
        "com.apple.ppp.pptp",
        "com.apple.push_notify",
        "com.apple.Rooms",
        "com.apple.salearn",
        "com.apple.saupdate",
        "com.apple.server.filesharing",
        "com.apple.server.mail.alerts",
        "com.apple.server.netboot",
        "com.apple.server.opendirectory",
        "com.apple.swupdate.host",
        "com.apple.swupdate.sync",
        "com.apple.xcs.stats",
        "com.apple.xcsbuildd",
        "com.apple.xcscgsessiond",
        "org.amavis.amavisd",
        "org.amavis.amavisd_cleanup",
        "org.calendarserver.calendarserver",
        "org.clamav.clamd",
        "org.clamav.freshclam-init",
        "org.clamav.freshclam",
        "org.dovecot.dovecotd",
        "org.dovecot.fts.update",
        "org.freeradius.radiusd",
        "org.isc.named",
        "org.jabber.jabberd",
        "org.jabber.proxy65",
        "org.postgresql.postgres"
    );
    enabledServices =     (
        "com.apple.apspd",
        "com.apple.collabd",
        "com.apple.DeviceManagement.devicemgrd",
        "com.apple.DeviceManagement.postgres",
        "com.apple.DeviceManagement.SCEPHelper",
        "com.apple.opendirectorybackup",
        "com.apple.server.alertsd",
        "com.apple.server.eventsd",
        "com.apple.server.v2.stats",
        "com.apple.ServerEventAgent",
        "com.apple.servermgr_xcode.get_currently_connected_devices",
        "com.apple.servermgr_xcode.sync_adc",
        "com.apple.servermgrd",
        "com.apple.disks.smart.status",
        "com.apple.xcscredd",
        "com.apple.xcscredhandler",
        "com.apple.xcsdevicesnifferd",
        "com.apple.xcsxcodeappwatcher",
        "org.calendarserver.agent",
        "org.calendarserver.relocate"
    );
}