The web page gives a thrust duration of 3.45 seconds.
The thrust curve graph calls it ~3.0 seconds.
Look closely at the graph - count the time axis increment marks. Something is wrong between 2 seconds and 3 seconds, time gets compressed?
Please publish corrected graph, and get the longer delay ones back in stock. Kindly give this motor the thrust curve graph it deserves. PS, Isaac Asimov is smiling.