SCEP Definitions

I have an ADR that automatically downloads and deploys SCEP definitions.  I have noticed a number of my clients are on newer versions of definitions than what is available from the SUP.  For example, my desktop was on 1.187.1710.0 today which matches what is on the SUP, but when I manually updated it went to 1.187.1788.0 which isn't available from SCCM.  I have a number of clients that are on 1.187.1741.0.

Any idea why this is occurring?