Yes

Oversimplified might be a better description but there needs to be a rule even dumb people can use

So the rule is: discard whatever comes first

If you expect every home distiller to understand the nuances of this you're going to end up with a lot of "accidents"

[dead]

Having seperate boiling points wont matter if they form into an azeotrope. Not all liquids can be distilled from one another even though every liquid has a different boiling point.