Well, I can explain that. Somewhere I read that there would be a passage to North America, so I could achieve the first UHV goal. Since about 930AD, I had a galley, with a Warrior and a Settler waiting near Scotland for the passage to open, thinking it would temporarily open at 1000AD or so. However, at 1050AD there was still no sign of a passage. I'd been looking in the full list of features and in the Civilopedia, but I couldn't find any information on how to open it. Probably I didn't search in the proper location, but anyway. Then I thought, what happens if I give myself the Compass (I went for Guilds first). That worked as you all know, and because I didn't feel like starting all over again I WB'd myself the settler and the warrior and deleted the units and the galley in the process, as a sacrifice to the gods. It was a fun game though and it learned me a fair bit about military strategy, because despite my strategy not to put any efforts in stimulating the economy, tech progression was still very fast.
Contact with the independent and native civs is something purely visual, you can turn it on in the BUG mod options screen if you like. As you can see in the screenshot I don't mind if it's cluttered with information, so I ticked some things on and a few things off as well, to my preferences. The independents can even have a state religion, which I find quite funny.