As I already indicated, the "I Have a Question" section specifically says the answers are not meant to be official church statements.
You're absolutely right. But it is not difficult to find doctrine that the earth was a paradise and yet there was a garden of Eden as well.
and now he is contradicting his own evidence because he needs to in order to have Adam and Eve spread their genes throughout the world.
There is no contradiction because the properties which would establish the whole earth to be in a "garden state" or just a local garden are not set.
Not only is there a complete lack of proof for any of these "theories,"
I have merely used the word hypothesis. It's possible that from time to time I have said "my theory", but it is merely an hypothesis.
there is no internal consistency.
Plenty of consistency. I'd say you're confused because I can take my hypothesis in different directions and adapt it to various conditions.
It is 100% ad hoc.
Sure
ad hoc: "Formed for or concerned with one specific purpose"
All I've done is show plausible models in which evolution can fit with LDS doctrine.