Spell: Displacement?

[Twelve]

I am very new to arcane spell casters, so this may be ignorance and not a bug.  If so, please explain. 
PC: Ebrehim Torhalgan
- Has Greater Spell Focus Illusion

However; this does not seem to be true on my character:

Illusion
Displacement               

When cast as a spell by character (potion, item etc. use unchanged).Duration increased to 3 rounds / level. In addition to normal effects (50% concealment on the target), the spell creates a MIRROR IMAGE out of the target. 

Mirror Image makes a weak copy of the target. The copy has all stats dropped to 3. If target is the caster itself, constitution remains whatever the caster has as a base.  Mirror Image is immune to mind spells, has -10 AC and 50% Concealment. Cannot be disarmed and holds no other items than what the target has currently equipped.  Mirror Image is a custom summon, preventing any other summons to be active at the same time (Unsummons every summon the PC possess, and Mirror Images vanish when summons are summoned).  Mirror Image can be also be released similar to undead releasing, making a long lasting decoy that wanders around on its own and can no longer be controlled by the caster. You can only have one released decoy out at the same time. Duration is until destroyed or replaced by a new one.

SF Illusion increases the number of MIRROR IMAGEs by 2.
GSF by additional 2, so GSF illusionist can have a maximum of 5 MIRROR IMAGEs out at the same time (still only one long lasting, wandering decoy)

The command /c mirror-image will mark whether the MIRROR IMAGE you release will be hostile to others or not. (default is hostile).

I have not tried to release or change if hostile.  It only makes one copy regardless if I cast it on another PC or myself.  Again, there is a  lot of ignorance going on with me playing a spell caster for the first time, so if it's something stupid, just let me know and delete this.

Thanks

[Sem]

It is worded queerly. The way it works is that there is a cap on the number of mirror images you can create, SF and GSF increase that cap. You still only create 1 clone per casting, but if you cast it say.. five times with GSF illusion. You can have 5 clones.

[Twelve]

Oh.


*feels stupid*


Thanks