Hi Matthew,
I came across the same issue and found solution.
Right click the “Place On Sheets (py)” node and select “Edit…”
Line 37 reads:
Ycenter = (maxp.X+minp.X)/2-((maxp.Y-minp.Y)/2)
you need to change that line to read:
Ycenter = (maxp.X+minp.Y)/2-((maxp.Y-minp.Y)/2)
There was a typo.
Hope this helps!