I'm having the same problem as well. I created a new Creative Cloud package on 1/23/15 with Creative Cloud Packager. I suppressed Updates and only allow them via RUM and I'm pushing them out using Remote Update Manager pointing to our internal Adobe Update Server. I've tested this on OS X 10.9.5.
However, I too get the message:
"Update (AdobeDigitalPublishingCC2014-2.0/32.0.0) is not supported by RemoteUpdateManager. Skipping processing of this update."
Doesn't make much sense to me. I will also try the recommendation you gave to create a package with just that update, but I'm more interesting in knowing why this particular update is not packaged with Creative Cloud Packager to begin with and why it won't install through RUM.