Question about tile resource generation in cities

So I've been doing some experimenting to see if I can answer this myself, and I'm still a bit confused.



The tutorial tip says that if you place a building on a tile it will be affected by whatever percentage gain that tile gives. If you put an influence generating building on a tile with +10% influence, that building will produce more. Easy. I thought I understood this.



Then I tried acquiring a tile that gave +10% energy and I placed a building in a DIFFERENT tile in the city that had nothing to do with energy (it gave research bonus only) and after it was placed, it was giving me 6.6 instead of 6 (that's 10 percent more).



So, it would seem that it does not matter where you place a building in your city. If you have acquired a tile, it will work, regardless.



I'm honestly not sure if this is right - any help would be appreicated. Thanks!



