PP CS6 same issue as described… and a fix (not a workaround).
In the program monitor, I checked the settings dropdown menu (the wrench icon), and “loop” was unchecked. I tried turning it on and off, both settings continued to loop the sequence when the final frame was reached.
I then went into my “buttons editor” (the plus icon at the base of the program monitor), and dragged a “loop” button onto my visible buttons palette. Switching this on and then off did the trick. Now, no looping in that sequence.
Hope this helps.
Houston