It's complicated. The article is right, and I'm right - because we're essentially saying the same thing. Let me repeat a previous post:
That article makes the issue confusing. The issue can get complicated when multiple charges for the same act are presented. At the end of the day, if there are multiple guilty verdicts on the charges, he will only be found guilty on the highest degree charge - if that makes sense.
So if it's guilty on Manslaughter 3, Murder 3, but not guilty on Murder 2, then the final conviction would be Murder 3. He wouldn't be guilty of both charges, because they are for the same crime.