Dysfunkshunal - Perhaps your issue is also related to the PMD's being On. Try to see if they're on or off. And uncheck Use Binary Morphtargets. That likely won't save your botched scenes but should prevent it from happening on subsequent saves.

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You just can't put the words "Poserites" and "happy" in the same sentence - didn't you know that? LaurieA
  Using Poser since 2002. Currently at Version 11.1 - Win 10.