I was going to say the same about self defense. If they find he acted due to self defense, that would apply to all charges.
Why would not the penalties be included in the Jury instructions!
Would that tend to alienate a Jury upon knowing sentence?
correct.
this whole compromise verdict crap is not what the jury instructions are and by the legal definitions of what constitutes manslaughter and murder 2, they would not possibly convict on either charge.