[Sundraoi]

Isn't that how the game works, by default?

that's what im unsure of.. can you tell me by default the max allowable summons ive only ever played mutliplayer

The server is set up with the game defaults. A caster can have 2 under his control, the companion/familiar and a summons... if they have the means (druids), they can have a third with the animal empathy skill.
However, if your caster is a member of a faction, they will also have the summons the faction item allows which does not replace any other summons they may have. So, if in a faction, they can have 3 or 4 (w/animal empathy) under their command.