I am working on the Curator Class II achievement and when I left the first museum to go to the second, Flemington Primary was at the museum. When I came back to the first museum from the second, they were still there and are stuck at 50%. They were looking at an info stand and that's where they are now. I have closed and reloaded but nothing changes. 

I am playing on PC through Steam. Let me know if you need anything else.