<the op question is answered, simply the engine disallows more PM levels until such time as alignment swings back to meet eligibility>
Alignment in a electronic medium for RP purposes is hard (er) to "accomplish successfully".
The medium itself often only permits (1) dialogue or (2) quest / activity results in more or less 6 categories. Good Neutral Bad - Lawful Neutral Chaotic.
But alignment RP is not really about "game balance".
There are sufficient power build options in both electronic and table top medium to sufficiently allow for game balance. Balance is only about PvP ` 1 player verses 1 player if allowed. That is not really a D&D concept except in the rare "duel" role play. Balance is achieved verses the environment and against other groups be they swarms of Orcs, NPCs, Undead, etc.
Alignment was always about role playing the "type of person"; and the restrictions were always about choices and consequences. Hence it is harder in the electronic medium. Few campaigns in electronic form can script out "multiple paths" of choices and consequences and hence it is limited.
Justification about alignment bending was always subject to negotiation between the player and GM ; and that flexibility is needed. Does a Paladin slay a "Bhaal-spawn" child that evidences evil ? In table top the very situation can be Role Played over time with consequences either way... in electronic medium...possible but harder.
