In regards to the selection process of the teams involved in the tie, I think I know what the conference may have done.
Lesley and Becker were awarded the third and fourth seeds by the NECC. Lesley, buoyed by a 3-0 mark against Becker, had the best record (4-2) of the three teams involved in the tie. Therefore, Lesley was awarded the third seed. Then, that dropped the number of teams in the tie to two, Becker and Newbury. Becker won the season series from Newbury, 2-1, and based on that, Becker won the fourth seed.