Under some conditions, Poser will fail to save ERC in joint-controlled morphs.  This problem is longstanding (back to at least Poser 5), but it seems to have worsened with P8 SR3.

Basically, JCM ERC is not written for actors which are hidden both when a file is opened and when it is saved.  Visibility is the key.  LesBentley has determined that the ERC will not be dropped at all if it is routed through a valueParm dial.

I'm not sure this is the same problem you're seeing.  We've been discussing it a lot in the Antonia thread.

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Cage can be an opinionated jerk who posts without thinking.  He apologizes for this.  He's honestly not trying to be a turkeyhead.

Cage had some freebies, compatible with Poser 11 and below.  His Python scripts were saved at archive.org, along with the rest of the Morphography site, where they were hosted.