Gaussview GMMX grid seach: job completed before going through all the structures

I am recently using the GMMX add-on in gaussview to conduct conformer search. I was using the grid search method and the progrom suggested the number of structures is 729 (See picture below). I submitted the job and it completed normally. However when I checked the log file, the "Nmin" is 496 (See picture below). I think "Nmin" should indicate the number of times of minimizations. So what I am confused about is why it is not 729? 


If it's some built-in algorithms to skipping some structures, I got even smaller Nmin when I was using smaller bond resolution.


Thanks!


[![my GMMX setting](https://i.stack.imgur.com/xkAaC.png)](https://i.stack.imgur.com/xkAaC.png)


[![last three lines of the gmmx-log file](https://i.stack.imgur.com/dze78.png)](https://i.stack.imgur.com/dze78.png)


