The goal was to cover the the important highlights of the relationship, since Ellens factors into a few future chapters prominently. As for detailing the other dates, it came across as unneeded fluff so was edited from the final piece with only important developments listed. (There were a dozen or so dates at least before the intimate one, but a laundry list of dates felt pointless to include.)
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Also aye, the chronology is a bit tough to follow due to the edits for brevity, I'll see about fixing that in the near future.