Films can be wrong too. Especially with a universe as interconnected as this somethings the small details don't like up with the broader universe and background details, while yes are evidence, are not alone the deciding factor in a placement ever. Especially when another official source provides a direct statement on placement. If these were two background details yes I'd agree there's more debate as to which should be considered correct. In this instance the Timeline book provides the most recent and official placement for that specific scene. We are not ignoring the evidence, it's still evidence, there is just different more specific evidence that disagrees.