C'mon guys, answers like "i believe" don't really help now do they. Here are the correct definitions for the NPC Spawn Editor
Range = NPC speed; 0 is near player walk speed, 7 is stationary (no movement from the point you have set for spawning).
Param = Spawn Time for the NPC, however, if the npc is stationary the Param values 0-3 will allow you to set the direction the NPC will face (example Priest npc).
Count = The number of the same NPC you would like to spawn from the given X Y location. If the first NPC occupies the spawn location the server will determine an X Y adjacent to the spawn point to spawn the NPC.
Best of luck with your server.