I have been in probably twenty or more leagues that requested to move the start date up to the upcoming Monday, some even that ran waivers that same Monday. In every one of them the entire league exchanged e-mails before the request was made to make sure no manager objected. If one manager objected, then we all waited that extra week out of courtesy for that manager. I find it strange that a person from any league would request that type of change without feed back from the entire league.
I think Bernie did the correct thing by pushing the start date back to the original start date due to the recklessness of your league member.