Remember (and sorry for not saying it because I forgot) to delete the dbo and bin files after making changes to an entity if you want those changes to show up. If you are using a recent update and deleted the bin and dbo files, it will indeed raise the object.
I understand that enlarging the object pushed it through the floor. That makes sense because the center of the object changed position.
To change the scale of an object in FPSC, add SCALE= to the fpe and the percentage number of the change you want, like say 200. Again, this will change the position of the objects center and push it through the floor. You will still need to use RAISEFACTOR= to raise it up again. Don't forget to delete the objects bin and dbo files.
Brian.