Need help to understand encounters

I read over Buck Danny’s tutorial, and i found this topic:
http://the-starport.net/freelancer/forum/viewtopic.php?topic_id=2635&forum=7&post_id=24579#forumpost24579
but couple of questions remain:

if i make a new formation for example:

[EncounterFormation]
ship_by_class = 1, 1, sc_cruisers
pilot_job = assault_leader_job
make_class = wanderer
ship_by_class = 2, 2, sc_gunboats
pilot_job = assault_job
make_class = wanderer
ship_by_class = 2, 2, sc_fighters
pilot_job = assault_job
make_class = wanderer
formation = cruiser_gunboat_fighter
behavior = wander
arrival = cruise
longevity = 50
allow_simultaneous_creation = false
zone_creation_distance = 0
times_to_create = infinite
[Creation]
permutation = 0, 3

and i add a new formation:

[Formation]
nickname = cruiser_gunboat_fighter
pos = 0, 0, 0
pos = 60, 80, 60
pos = -60, 80, 60
pos = 85, 60, -85
pos = -85, 60, -85
pos = 110, 70, -70 ???
pos = -110, 70, -70 ???
pl_pos = 0, 160, 500

Then if im right, the first coordinate belongs to the leader ship (cruiser), the next two belong to the gunboat (min 2 / max 2, according to the encounter ini), the next two belong to the fighters ( min 2 / max 2). The next two, i dont know what means, the last belongs to the player if takes formation i guess.

Same problem to understand the walls:

[Formation]
nickname = cruiser_wall
pos = 0, 0, 0
pos = 200, 0, 0
pos = -200, 0, 0
pos = 0, 200, 0
pos = 200, 200, 0
pos = -200, 200, 0
pos = 400, 0, 0
pos = 400, 200, 0
pos = 0, -200, 0
pos = 200, -200, 0
pos = -200, -200, 0
pos = 400, -200, 0
pl_pos = 0, 0, 500

What these coordinates stand for? Are they limits or what?

There “extras”… just in case there called for a larger formation at any time

you mean cruiser_wall? leave it as it is?

& yep, there positional data. pl_pos is your position when you form (F4)

ok, but what are that 2 more coordinates then?

So far so good. But why is that, when zone population contains same faction with different encounters, the higher shipclass appears only?
I have an area defend (fighters), cruisers, and battleship encounters, with appropriate weights, and only the battleship encounters appears, if i delete this, then the cruisers appear, if i delete the cruisers either, then fighters appear.

Gisteron wrote:
FL appears to prefer the last entry of your code. if the density is set too low, the first ships it spawns do appear but then the limit is reached and the next class cannot be created in the zone.

Yeah, the low density was the problem, two units from same group filled the max numbers.

Thanks a lot