Well, that's not a very clear explanation but, let's see if i got it!
At the 1st paragraph of that doc it says the HD6000 series are now part of legacy products. And so i guess i should only use the Catalyst driver and not install the whole Crimson pack, right?
Assuming that i just wrote is correct, then why going down on the same doc we see this??
Yes, because i also tried the Beta Crimson Driver!
And why does AMD Gaming Evolved shows that i have the latest Crimson installed and the Crimson itself don't?
It doesn't seem like to be a "confusion" as you mentioned. Not mine, at least.
It looks more like a bug or not updated info, by AMD!
So what should i actually do??
All discrete GPU's have been moved to legacy status, there are no new driver release planned for them.
You can find the list of supported products in the Release Notes for each driver.
The last supported driver for your product is Crimson 16.2.1 (beta) or 15.7.1 (WHQL)