Quote - I do remember running into this problem a year or two ago...
There was something about Poser calculating displacement bounds based on the materials displacement value.
Your value of 21 could be the materials displacement value times 12.

Yes, my material displacement is set for 1.75.  But how did you come up with that?  Where is the x12 coming from?

I thought bounds should be a value equal to (or higher than) the highest amount of displacement in use by a material.