The +2 strength from the aegis customization option 'Brawn' is not stacking with belt of giant strength +2. not sure if this has to do with temporary ability bonuses or not. But my character has been wearing the belt long enough for the belt bonus to become 'permanent'. I don't know of any option to tell pcgen that the ability bonus from an item like the belt should be taken as permanent. (since its been over 24hrs within game)
Nothing of the sort. The issue is the person that coded up the Brawn made the bonus an Enhancement Bonus; which matches the Belt of Giant Strength. Since the program uses the stacking rules, the two are not added together.
The question needs to be should Brawn be an enhancement bonus or not. This requires investigation; if you have a source to cite that would help.
Ah, I'm an idiot. Brawn is an enhancement bonus and does not stack with the belt. Should have known....
Glad to help... We'll close this out then.