Display Time Left in a Course

Hello!

I'm creating a compliance course that needs to run a certain amount of time per state requirements. The client would like the learner to see the time remaining at several points within the training. I found a sample project that seemed like it would work if I just added a trigger to subtract the project time elapsed from the course length (60 minutes in this case), but when I copy-paste the triggers to the next slide, I need the timer in, the timer is going twice as fast. If I only use the triggers to subtract on subsequent, the timer doesn't move. 

Which trigger should only be in the project once, and which needs to be on each slide I want the timer on?