Go to Analysis tab, then mass prop, preview will show you where the current CG is. If it is not the same as the parameters, then it's possible the relations are broken or you need to do a manual refresh on the weight/cog. I do that under File - prepare - model properties - mass properties change - generate report on the pop up menu.
If you have advanced assy option, you can create a using the mass properties under analysis and you won't have to use the parameters.
