I'm aware of the historical data(I even have old books*pdf* from the A.C.S). The point here is understanding your position & interpretation not the historical data
I have issues with what you are saying
(to be specific, I think you are misinterpreting what i'm saying).
But before I give my critique I want to be sure I am clear on just what it is I'm critiquing. So, lets try this again before we get lost in this convo.
Your Position:
(as I currently understand it)
Colonization
1. Liberia was never colonized and remained free of the U.S. federal government and European nations
2. Liberia was aligned with U.S. interests and as a client state the European nations left it largely alone other than adjacent land sized by Britain & France
Timeline
1. How could the U.S. federal Gov secure land via the B.C.
then the A.C.S go buy land from the local Africans, when the land was bought before the B.C. ever occurred?
Berlin conference
1. Liberia declared it's independence in 1847 from the American Colonization Society
2.The Berlin conference occurred in 1884-85
3. (How could / why would) the the U.S. attend the berlin conference when the U.S. federal government never had an African colony?
Is the above a correct or wrong assessment of your issues / questions? If so I'll begin my critique. If not we'll go through this again until I'm clear on what your saying and I'm critiquing.