Both of your links are to FBI press releases stating that what is contained as far as dates, etc., is a timeline. The difference is that one predates the other.
Yes, they both have dates. I can find no discrepancy between the two, so I am not clear on what you a saying.
Just because there are big gaps in the Portland release does not negate the Anchorage office's timeline.If the Anchorage press release was inaccurate, it would not still be posted on their website.