Can't select multiple options in "Pick Many"

I have a pick many freeform that will only allow me to select one. I have looked at other threads and while I did convert it from a pick one slide, the set button set to none solution isn't working. When I select my buttons, they do not have a button set option under right click. I've looked up button sets and I see no indication that I have a button set on this slide at all. I have also rebuilt the slide and am having the same issue. 

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