"the jury has the right to determine the facts and the law." <-- I'm not sure if I'm understanding your intent with this statement.

"A guilty verdict is a fact finding verdict."

"The evidence phase of the trial is to determine if the evidence is sufficient to establish a crime occurred beyond a reasonable doubt. The jury is allow to determine the laws are just or not in the sentencing phase of the trial. If the jury feels the law is unjust or the penalty is unfair, they can either refuse to sentence the person or give a sentence that they feel fit the crime. Would there be an issue about the jury cannot decide a sentence?"

Sorry, but that is simply untrue.