Bug

So I saw a few bugs, number 1 so I was in creative and I was playing for fun then I saw a village, then I was hapy I found one then I saw a villager house that was half done, I will post pic for proof, number 2 the lighting bug so I was on survival it was getting dark so I dug into a wall and cooked some wood in a oven then I dug behind it but I saw something that was wrong the space I dug be hind were REALLY REALLY DARK like nearly pitch black and I must place so much torches for light and its really dark when I dig right next to a torch that the 2nd bug, number 3 so I got on ignoring the 2nd bug described above and then I thought it was a good Idea to go out side but when I opened the door there was no sound like there was no door then I looked at the door more and it looked glitched and I could see 2 parts of the door and were VERY THIN I will post pictures so you see what im talking about