Well, let's see. I never did figure out how the triangle moves. I just figured out the other shapes and then tried the triangle in every other space. Other than that, the cryptic puzzle was fine.
It took me a while to realize that I was supposed to record what actually happened to the best of my knowledge in the diary instead of just recording what people said happened. This might not be a big deal but maybe some indication that you are supposed to change their story to match the facts as you find out more.
As far as figuring out the time, I know how I was supposed to do it, and it's perfectly fair, I even found the guy with the watch set wrong. But I discovered it was just easier to use the messages about how many are right and how many are in the right location to deduce the order than to go around talking to people and looking at things again.