Perhaps the "restart" switch is turned on, which would prevent starting from time =0. The "restart" switch is arguably mis-labeled. It should be something like "resume" or "continue calculation", as in Flow Simulation. To me, "restart" would indicate you want to start over, from the beginning.
There should be an "advanced" button in the properties of the study where you can increase the number of iterations until it gives-up. Good luck.