Lineout Targets

When setting up the line out strategy, is the jump target the number on the players back or the number in the order of the line out, I.e 2 would be 4 jumping.
If it is number on the players back then you have the option to throw to the hooker which doesn't make sence.
If it's the order in which the player stands, then there should be 8 people in the lineout, this doesn't make sense either.

Has anyone got any ideas?
On their back. Order posted in other threads that are easily found

2 is an error fyi
Cheers Monks, that clears things up