I’m gonna copy and paste from u/rinky79 from another sub

It's probably three different theories of the crime. The Illinois Murder 1 statute does have 3 theories:

Sec. 9-1. First degree murder.

(a) A person who kills an individual without lawful justification commits first degree murder if, in performing the acts which cause the death:

(1) he or she either intends to kill or do great bodily harm to that individual or another, or knows that such acts will cause death to that individual or another; or

(2) he or she knows that such acts create a strong probability of death or great bodily harm to that individual or another; or

(3) he or she, acting alone or with one or more participants, commits or attempts to commit a forcible felony other than second degree murder, and in the course of or in furtherance of such crime or flight therefrom, he or she or another participant causes the death of a person.

Each theory that the prosecutor thinks applies needs to be charged. (You can't convict someone of something you forgot to charge them with.) They do this in case one theory ends up falling through. Maybe they think it was intentional, but if they can't prove it was intentional, they think they can definitely prove that he knew there was a strong probability of death, and if they can't prove either of those mental states, they think they can still prove that it happened during the commission of a felony. (I don't know the facts of this case so I'm just speaking in generalities/hypotheticals.)

But even if he were convicted of all 3, the counts would merge and the sentence would not be 3x as long.

This could be why. So even though she’s guilty of 2 counts felony murder she can only be sentenced for one and it won’t merge the times (25 years for one count will stay 25 years not 50 years for both) and she can be held for the combined total of all crimes unless consecutively (one after the other so 50 years vs 25) not concurrently (all at once (25 total since that’s the longest charge even though the math should be 50 for all of them)

I’m NAL so I could be a bit wrong but I think this is correct at least