No, I think he means that his models moves. It's doing the same thing for me. I'm an architect and document at 100'-0". In the past, I could export out to datasmith and move my model inside the twinmotion environment and align to ground. However, if I go back to the Revit model to make a change and resave the datasmith file, the model doesn't stay in place - it appears to put it back at 100'-0" above ground. However, when I move it 100'-0" down, it does align pretty well, but the X and Y is off and I have to re-adjust everything.