Narla's post in [1.05] Cipher - potential issue with Max Focus capacity was marked as the answer
You have the equations and/or order of operations wrong. Here are the equations for max focus and start focus for 1.05:
BaseMaxFocus = 20+level*10
ActualMaxFocus=BaseMaxFocus+GreaterFocus
StartFocus = (BaseMaxFocus/4)+GreaterFocus
Edit: in case you were wondering, here are the equations for 1.04
BaseMaxFocus = 20+level*10
ActualMaxFocus=BaseMaxFocus+GreaterFocus
StartFocus = BaseMaxFocus/2
