I recently took interest in analysing videos, and want to ask some questions directly to someone that is an expert on the subject.

Considering: 1- New world generation - The little graph should always start in a corner yes? Are there any exceptions? If a run starts with the world being generated in the center, is it considered to be a loaded world? I saw this somewhere, and after I tested myself, its absolutely correct. Can anyone affirm?-------------------

Not really, it shows where the spawn chunks are. There is a chance you spawn in one of those and the graph starts in the center.

But when a world is loaded it always starts in the center.

(This might be wrong but in my research i found this, please someone correct me if this is not right)

worlds with the same seed will always load the same way,

BUT different seeds can load in different ways, not just always in the corner