However the "offical or unoffical" doesn't have any evidence either, not in the text. It's a guess, Eb doesn't tell Harry that Margaret left Raith in 1968 and met Malcolm in 1969. Margaret in the soul gaze doesn't tell Harry she left Lord Raith and then met Malcolm and fell in love.. None of that is written in Blood Rites, if you can find it please give it to me.. Otherwise its a guess, just like my speculation is.. Yes, that is also possible..
The official timeline does not need evidence in the text. Is it based upon speculation and guesswork? Yes, but it is official because Jim has given it his blessing and hosted it on his website. It is not completely filled in, but what is present is accurate according to Jim at this time. He can always contradict or change it later, but for now that time line is considered canon.
Okay, it's very hot and humid here and my brain is par boiled.. Here is a crazy theory to hang onto your tin foil hats boys and girls...
The star born skeem was actually hatched in an agreement between the White Court and the White Council, and Margaret was the designated incubator with Lord Raith as daddy... This could be one of the reasons why Eb almost irrationally hates vampires, or maybe just vampires of the White Court. What is strange is there was a time when Eb would dine with Lord Raith, Arrianna, and Margaret, so he didn't always hate them.
I doubt that the White Council and White Court would scheme together. The White Court views vampires with distrust since they can corrupt and convert human wizards. The White Council, as the guardians of humanity, are naturally set against all other forces that seek to control/enslave/destroy humanity. Elaine and Harry are both starborn with two mortal parents. There is no reason for Maggie Sr to intentionally have a child with a white court vampire to create a starborn. Why would the White Council want a starborn that another group/organization has claim/influence over. Especially an organization that can bend others to their will like the White Council. Ebeneezer hates the White Court because Lord Raith killed his daughter. There is no need to find another motive for his hatred.