The following link provides a copy of the letter in which Phyllis asked Anne to resign on April 10th.
The following link provides quotes from the board members about Phyllis' participation in the meeting.
http://dailycaller.com/2016/04/11/strife-continues-within-phyllis-schlaflys-eagle-forum/
When we have a copy of the bylaws, we can determine whether or not they were violated. Until then, it's an accusation by one offended party in a family civil war.
Your first article makes it clear the fight is over her endorsement of Donald Trump, so the attempt to make this a "family civil war" unrelated to the Cruzer instinct to punish dissidents is false.