Where did box 5 go? about flowchart.js HOT 1 OPEN

OK, I solved it by systematically changing the pathx values, so what are the rules on how to label components?

`box1=>parallel: System box 1
Is there a comment method?
box2=>parallel: System box 2
Organising boxes looks like a great
way to document systems and
incorporate hyperlinks.
box3=>parallel: System box 3
The lines have been whited out
so that they are hidden.
box4=>parallel: System box 4
Oops, Where did box 5 go?
It should be below me.
box5=>parallel: System box 5
box6=>parallel: System box 6

box1(path1,bottom)->box2
box1(path2,right)->box3
box3(path3,right)->box4
box4(path1,bottom)->box5
box4(path2,right)->box6

box1@>box2({"stroke":"White"})
box1@>box3({"stroke":"White"})
box3@>box4({"stroke":"White"})
`

from flowchart.js.