Hello- please also see
https://wiki.mcneel.com/rhino/faqtolerances
Modeling this in feet at .01 tolerance will lead to trouble as well.
I would greatly simplify the curves, and of course pay attention to tangencies as John points out. lastly the bottom part of the cushion curve hooks in at a radius below the .2 of radius of the fillet that you are trying to apply - that will also lead to problems.
If you leave that lower corner completely sharp and just fillet it with all the others, that should work too.
All that said, when dealing with cushiony shapes, using V7’s SubD tools is the easiest and best way out.
-Pascal