On the pathfinder character sheets in the campaign I run the chaotic good alignment when selected doesn't stay after the sheet is saved and closed. It goes to chaotic neutral. All other alignments stay on the one selected, but chaotic good changes itself to chaotic neutral.
Safe to assume this isn't the PF Community sheet, since it doesn't use a selector field for alignment... Which PF sheet are you using?
Our character sheet template is 'Pathfinder Simple'. Tried moving her alignment to chaotic good today and still it just sets it to chaotic neutral. Its the only alignment this happens with.
I would try shooting the sheet's author a PM Stephen L.