Your #70 seems to have the same illogic embeded as Radio Astronomer's post. Trees simply don't grow in unison, so you cannot assume something that was not observed. Also, living trees are only agglomerating c14 in the living portions, not the core. There is no measureable exchange between the cambium and the core wood.
Right! And the Carbon-14 begins to decay in the dead parts.
Take a look at the site below. Note however that the calibration curve has been extended past what this site has--it must be a couple of years old. http://www.sonic.net/bristlecone/dendro.html.
If you still refuse to see this evidence I'm going to have to stop trying. If you are a young earth creationist and will not entertain any other view, then spending my time trying to explain things is useless. If that's the case just say so.