What was the point of having a primary if all the council candidates are still in the race? None of them were eliminated.

I think 9 At-Large candidates had originally filed the necessary paperwork and 8 were on the primary ballot.  So 2 were eliminated.  Still, estimates were that it cost between $25k and $75, which was a pretty big waste to narrow the field from 8 to 6.  However, this is probably another town charter rule like the 9500 (1/3rd of registered) voters rule for repealing ordinances.  It's long and cumbersome to change.