Your sources are wrong. There are 2 Elizabeth Fuller's, one we don't know her parents and researchers keep on connecting her to the Elizabeth Fuller who married a Rowley. We belive the Elizabeth Fuller who married Moses Rowley, this was her only marriage, and all her
children come from him. I don't think it makes sense she had 3 marriages.
I believe the Mayflower Society believes she only had 1 marriage also, so they would not accept the Elizabeth Fuller who married a Scott and Upson as Mayflower connected.