I am talking about the bar that highlights which option you are on when you open the start menu.
On AK Edit the bar is aligned perfectly. Also you cannot change the vertical position of the bar only the horizontal.You're right that there's no option to set the vertical position or height of the selection bar, but I've found that setting itemHeight = 16 seems to keep the text and bar centered vertically.
Here's a run down of what each value under [start menu] changes for anyone who's interested:
x = Distance of Start Menu from Left Edge of the Screen.
y = Distance of Start Menu from Top Edge of the Screen.
itemX = Distance of Text from Left Edge of the Start Menu.
itemY = Distance of Text from Top Edge of the Start Menu.
itemHeight = Spacing between Start Menu options.
itemWidth = Width of Selection Bar.
barLeft = Distance of Selection Bar from Left Edge of the Start Menu.