But, you want to get lore monkey? Let's get lore monkey. Now, in a narrative passage, it says that "after the Shadow passed, Celeborn came forth and led the host of Lorien over the Anduin in many boats." But then, in the timeline it says that on March 28, Celeborn crossed the Anduin and the destruction of Dol Guldur began. And by April 6, Celeborn and Tharanduil are meeting "in the midst of the forest." So, if you're correct, that's what... 8, 9 days to cross the river, fight through Southern Mirkwood, tear down Dul Guldur, and then walk halfway to the Lonely Mountain to take tea with Tharanduil? WOW. Mighty impressive. Or... again, invoking the conceit that every word of LOTR is written and compiled after the fact by explicitly named chroniclers, hobbits in fact who did not have personal knowledge of what went on there and were only hearing it, very likely, third-hand... Celeborn sent counter-attacks into Mirkwood, beseiged Dol Guldur, and killed or drove off some top leaders of the orcs there
prior to final victory. Celeborn has
not crossed the Anduin himself yet, and Dol Guldur has
not been destroyed yet. You see it, at best, as splitting hairs, I see it as a neat and elegant way to slide some fun action into the uncertainty and gaps.