To position the head correctly you will have to scale it, go to roblox app (desktop or phone) and then go to the avatar section, then click on the 3 bars and choose the hat simbol, pick the head and then move it fully into the “Y” axis, after this go to the size part (square symbol) and pull the bar to the max.
Data is not updated in real time. Most stats update within seconds or a few minutes.