So, I have made my Myan Pyramid. I don’t know why, but I had issues along the whole process. It didn’t come so easy as in the video and in some parts I had to do it “My way” to work, because I couldn’t figure out what was wrong. So I am posting my finished pyramid, but I have a question.
For the stairs I had to make a second face (top) so I could complete a single stair, thus using the array modifier after that. The reason being is that when I extruded the edge it didn’t make a stair like in the video., but only a single front face. Can someone explain why this happened? I have to tell you that my ramp had to be done in a different way than in the video, because I couldn’t figure out what I was doing wrong.
It because of the ramp pull the stairs a little bit up. the ramp went through the the stairs
I made them exactly like in the video. With a vertex of a 0.2 extrude in the Z axis and the ramp shouldn’t have made it through the stairs. Are you suggesting that I start them a bit higher instead from the bottom?
Possibly
I think i may have found your problem, if it still is. it looks like your stairs may not have been perfectly square. check the, in this case, x aand z axis of the top and bottom of each step
the difference .05 on my z axis makes
Well, I understood what you mean, but I kinda don’t know how to check it 
But I made a half stair and moved the front face and I received a very funny/interesting thing. I’ve got a second face and now I don 't know what is happening
That is odd, it looks like you may have extra vertices you dont want.
Try to delete just the vertices without messing with your geometry. I suggest pressing X or Delete, and then choosing dissolve vertices but be careful, dissolving can have weird effects.
Or even selecting all with A and then removing doubles.
