I have read that Tomino stated that Turn A Gundam is supposed to be set 500 years before Gundam Reconguista in G (which itself was stated to take place around 1000 years after UC).

Here's what I don't understand: it is stated in official materials that Turn A series take place in the year 2343 of Correct Century and Correct Century according to official timeline only started at the very end of Black history period (which I believe is the end of UC era).

But how can this be? If Gundam Reconguista in G is supposed to take place 1,000 years after UC ended wouldn't that overlap with Turn A timeline placement? And there's no way that CC can be considered taken place 500 years after UC, since the events in Turn A were in the year 2343, which implies that at least 2343 years have passed since UC calendar was in use.

Did I miss anything? Was there an official explanation from Sunrise regarding this issue?