Four men have filed lawsuits over the past year alleging they were sexually abused decades ago at Bergen Catholic High School, with several more civil complaints expected in the coming months — the result of what legal experts say may have been a miscalculation when school officials didn’t contribute to a settlement made eight years ago by the religious order that runs the school.

Participating in that settlement would have barred future claims against the school, according to experts, who said school officials may have believed they would be protected against such claims because of restrictions on sex abuse lawsuits that were in place at the time — but that have since been removed.

Mitchell Garabedian, the attorney who filed the recent lawsuits, including two last week, said he plans to file an additional seven complaints against the school under a New Jersey law that has suspended the civil statute of limitations in such cases for…