Getting confused

You're gonna see differing opinions on this. Some say hose on the bottom, bleeder on top. It does not matter where the hose is oriented. The position in your first picture is optimal and here's why. That bleeder is as close to the top as possible. Swapping it so the hose is under it like in the last pictures positions the bleeder a "little" further down and leaves space at the top of the piston for some air above the bleeder. That's what's important. Getting that bleeder as high as possible. The air will come to the top regardless of hose position. I don't know how that argument ever got started.