@EldritchCellar, Now that's a big question - bigger than a short answer will do in the FAQ!

I suspect that EasyPose codifies the dial values on export as a certain manner that is misinterpreted by Carrara 8.1 and there is nothing that can be done through Carrara to ingest the export in a manner that will change that. I'd suggest either utilizing  C8.5Pro to ingest and test, or running the file through DAZ Studio Pro's rigging and then into Carrara to see if that will remedy the functionality.

(Important note: I have zero experience with EasyPose but am familiar with similar issues with other software that I work with)