IE doesnt work properly on this screen. also, please note that each zone column may have only one player, that is why one disappears when you put the second.

the idea is to have at most 5 players per region. if you want a “diamond” tactic, you may use more than 1 zone to do it.

ps: by zone i mean attack, midfield and defense.

Here you can see an alternative for using a 4-4-2 diamond:

http://rubysoccer.blogspot.com/2007/08/diamond-formation.html

For the 3-4-3 diamond you’d have to unbalance your defense or attack sides, if you know what I mean.