This sounds like double transformations to me. Meaning, that you probarbly have grouped the curve that define the vase, with the vase.
This result in the group moving the vase, and the curve plus the curve moving the vase aswell = the vase object get distorted, and moves the translation time 2 !
so make sure you dont have any curves grouped with connection or history to any objects.
I hope this helps
Senior 3D Artist,
Maya Software Manager & Maya Instructor
LEGO Systems A/S