Design a sustainable city project with Forma 

I created a proposal somewhere in Mauritius and when it is imported into Revit, you get this error message of alignment. I believe it is to do with the inherent limit of 40km from the Internal Origin. Is that normal? Does this affect the accuracy of my model? Also, I compared the contours generated in Forma and the ones in Google Earth. There appears to be a difference of about 10m and the contours are not same as well. Which datum level should I trust?