About the quickest way to check the timing mark for certain is to pull the top timing belt cover. You can line up the timing mark on the cam pulley with the mark on the plate behind it, then the timing mark on the balancer should be at 0 degrees. If not, paint a white stripe on to be the new zero and paint a line across the gap where the rubber seperates the inner and outer parts so you can see if it continues to move on you.

"Time and tide melts the snowman"